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Sysquake Release Notes

SysQuake 2.3

LME

• linprog
• disp output a superfluous empty line after logical matrices; fixed
• error and warning now accept a format string and additional arguments, like sprintf and fprintf
• true and false now also accept size arguments and produce an array, like ones and zeros
• in str2obj and related functions, functions "cat", "zeros", "ones", "eye", and "diag" were sometimes refused depending on the number of arguments; fixed
• functions called with the wrong number of input arguments threw the error "Wrong number of output arguments"; fixed
• reshape now accepts dimensions as separate arguments, and one of them left unspecified as an empty array
• functions sandbox, variables
• empty structures are displayed as "(empty struct)"
• islist gave true for structures; fixed
• isstruct gave false for empty structures; fixed
• new error messages: "Non-integer argument", "Argument out of range", "Non-scalar argument", "Non-object argument", "Not a permutation of consecutive integers", "Bad variable in the left part of an assignment", "Bad variable in a for loop"
• dumpvar displayed empty structures as {}; fixed
• info v didn't displayed correct information for structures; fixed
• x{:} didn't displayed an error message when x wasn't a list; fixed
• x(:) gave an error when x was a list; fixed
• in x(ix) = expr, where x was a list, ix couldn't be an array with more than 2 dimensions; fixed
• in (expr)(...,:,...,...end...,...), end didn't give the correct value; fixed
• functions defined in libraries imported at command line with "use" couldn't be referenced from functions defined at command line; now they're imported in both the top-level context and the _cli library where functions typed at the command line are defined
• variable references and assignments are now possible in nested structures and lists
• v.(expr) (field access with a field given by a string)
• global and persistent variables (not to be abused!)
• info returned lists of lists instead of list of structures for 'b', 'o', and 'v'; fixed
• info g for global variables and info p for persistent variables
• deblank
• private functions weren't always private; fixed
• fclose must now be used to close any file descriptor, not only those obtained with fopen (it replaces closedevice etc.)
• function "methods" now ignores private methods
• function "feof" didn't always work correctly; fixed
• in command syntax, arguments may now begin with '-', '/', '.', ':', and '*', in addition to letters or digits, provided they include at least one letter or digit
• in command syntax, '.' and '/' were considered as separators; fixed
• as error message wasn't always displayed when an unknown library was "use"d; fixed
• for a few functions, overloading might corrupt the argument stack; fixed
• user functions without output argument used with "map" corrupted the argument stack; fixed
• x(ix)=[] where ix was out of range might corrupt the argument stack; fixed (an error is thrown)
• fieldnames and rmfield cannot be used directly on objects anymore (they can still be overloaded)
• in fprintf, sprintf, error, and warning, '0' modifier pads with zeros instead of spaces (e.g. sprintf('%05d',-2) -> '-0002')
• fscanf, fprintf and related functions now support %o for octal
• in function roots, the test which decides whether a root is real or complex has been improved for polynomials with a very small first coefficient
• builtin functions isfield, getfield, setfield, and fieldnames cannot be used directly with objects anymore to get access to the structure; but they can be overloaded
• disp(list) now displays contents of small string elements
• command syntax for function calls is now documented
• replist
• fscanf with a single input argument corrupted the return stack; fixed
• in debugging mode, dbtype defaults to the current function if no function name is provided
• new error message "Bad list index"
• subsref and subsasgn now accept subscript type '{}' (with a subs which is a list of one element) to get or set a list element
• new error messages "Object too large" and "No more memory"
• better memory management
• functions encodebase64 and decodebase64
• "info b" sometimes displayed tags which weren't functions; fixed
• function polyint

LMELapack

• real / scalar complex gave a wrong result; fixed
• qr now supports pivoting with an optional third argument, like the built-in function of LME
• on Mac OS X, a version is provided for the optimized Lapack and BLAS libraries provided with Mac OS 10.2

Longint

• x-y, where x was a longint and y a double, might crash; fixed

Extensions

• LME_ext.h didn't export main functions correctly for Visual C++; fixed
• ImageIO, MMap, ZLib, Joystick

Libraries

• lti: (tf object).size didn't work; fixed
• lti: MIMO non-square systems of transfer functions weren't displayed correctly; fixed
• lti: tf::size now accepts a 2nd input argument to specify the dimension
• lti: code for access to nested elements in structures and lists simplified
• lti: tf::feedback required two tf objects; now it converts its arguments to tf objects and accepts expressions like feedback(tfobject,scalar)
• lti: tf::minreal didn't work for MIMO systems; fixed
• lti: added tf::fieldnames, ss::fieldnames, lti::isfield

SysQuake

• optional argument for frequency in commands bodemag, bodephase, nyquist, nichols, sigma, and their discrete-time versions
• cancel(false) in the idle handler -> does not redraw
• step by step execution of handlers in debugging mode, which was never supported, has been explicitly removed; breakpoints in handlers (or their subfunctions) display a warning and dump the local variables
• block "embeddedfile" in SQ file, which can be opened with function "efopen"
• when an error occured when fetching the special input argument for a handler, the next execution of any handler was sometimes disabled, or a hang occured when it was a mousedrag handler; fixed
• cross-figure drag&drop with handlers dragin and dragout
• impulse of a transfer function with an integrator sometimes didn't give the correct result; fixed
• graphics made from the command line weren't always displayed; fixed
• settabs with a string argument which didn't end with a tabulator didn't produce the correct alignment; now a trailing tabulator is added if necessary
• in the first call to the mousedrag handler after a click in a slider when a mousedown handler exists, the value of the slider was the maximum value; fixed
• improved memory management
• getfile didn't handle correctly multiple mime types separated with semicolons; fixed

SysQuake (Windows)

• input from stdin reused the previous command (e.g. "fscanf('%d')" followed by 5 in the command line interface used input "fscanf('%d')\r\n5\r\n" instead of just "5\r\n"); fixed
• version resource

SysQuake (Mac)

• commands like subplots couldn't be used in input handlers; fixed

SysQuake LE (Mac)

• on Mac OS 10.2 and later, use the Lapack framework provided in the system

SQ files

• image.sq: use an embedded file, and functions imageread & imagewrite for image file support instead of TIFF

Sysquake 2.2.3

SysQuake

• data (from SQD file or data block) was written to stdout; fixed
• in 2.2.2, the idle handler sometimes wasn't executed; fixed

SysQuake (Win)

• when an SQD file with subplots in free position mode was opened by double-clicking its icon, all subplots were displayed in the top left corner; fixed

SysQuake 2.2.2

SysQuake

• with the subplot command, skipping subplots didn't produce the expected result; fixed
• sliders couldn't be manipulated with an idle handler; fixed
• the data block of SQ files hasn't been decoded correctly since 2.0; fixed
• zoom undo wasn't always handled correctly; fixed
• in SQ files, handlers can be any function, not only those defined in the SQ file or its libraries
• in command "slider", slider limits given by the 2nd arg. can be a 2x1 row matrix even for several sliders; the same limits are used for all sliders
• scale is now initialized for commands sgrid, zgrid, hgrid, ngrid, circle, and text

SysQuake (Mac)

• the maximum frequency of idle handlers has been increased
• in the command windows, the home and end keys move the cursor to the beginning and end of the current command, respectively
• in SysQuake LE, fprintf didn't converted line feeds to carriage returns; fixed

LME

• in the base workspace, all undefined variables but "ans" (after "clear" or a syntax error) are completely removed
• the name of variables weren't available in inline functions, e.g. for function eval or for error messages; fixed
• eval without output argument hasn't worked correctly since LME 2.2; fixed
• fprintf with neither output argument nor semicolon doesn't display the length anymore
• in fprintf and sprintf, empty strings aren't skipped anymore with '%s'
• real + complex, where at least one of the operands was an array, gave garbage; fixed
• in strings, unrecognized sequences of characters beginning with a backslash are reported as error "Unknown escape character sequence" instead of quietly ignoring the backslash
• (complex matrix) .\ (real matrix) gave a wrong result; fixed
• operators & and | and function xor now support arrays
• same and unsame (and operators === and ~==) now accept any kind of argument
• reloading nested libraries sometimes didn't worked correctly; fixed
• in arrays A with m dimensions, removing elements along an n:th dimension with n > m (e.g. A=1;A(:,:,1)=[]) corrupted LME stack and could lead to crashes; fixed
• when elements were removed from arrays and the last dimension was reduced to 1, it remained (i.e. A=ones(2,2,2);A(:,:,1)=[] gave a 2x2x1 array instead of a 2x2 array); now it's removed
• display of arrays in lists threw an error; fixed
• function "deal" sometimes failed silently; fixed
• floating-point numbers in intermediate byte-code weren't always aligned correctly, which caused crashes on some platforms (such as Ultrasparc); fixed
• sort and unique accept list of strings
• imag(real array) produced garbage; fixed
• isempty(array) caused a bad type error; fixed
• in permute and ipermute, dimension permutation vector may be smaller than the number of dimensions of the array; remaining dimensions are left in the original order
• deal can have less output arguments than input arguments (superfluous input arguments are ignored)
• in input arguments, the syntax var{:} and expr{:} wasn't always handled correctly; fixed
• in "for i=vector" or "for i=matrix", i had flags which made "equal" fail when comparing i to a scalar or vector which should otherwise have been the same; fixed
• beta distribution in pdf and cdf
• icdf (inverse cdf)
• lasterr was reset too often to be useful; fixed
• error doesn't display anything inside catch blocks anymore
• map can now be used with functions without output argument (e.g. map(@disp, l) displays the elements of list l)
• in error messages, unrecognized characters outside the range 32-127 are displayed in hexadecimal
• on platforms where isnan and isinf return 0 or -1, these values were used as logical values, which might be revealed in rare cases; fixed
• svd(complex value) and related functions might corrupt LME data; fixed
• diff with arrays gave a wrong result; fixed
• in str2obj and related functions, function references are now accepted
• in str2obj and related functions, lists are no longer limited to 10 elements
• permute and ipermute didn't preserved the logical or char flag; fixed
• funm sometimes gave a wrong answer; fixed
• strmatch
• polyval now accepts arrays as 2nd argument
• repmat and reshape didn't preserved the logical or char flag; fixed
• size(reshape([])) and size(unique([])) gave [0,1] instead of [0,0]; fixed
• sub2ind and ind2sub now accept more subscripts than the number of dimensions; remaining subscripts are assumed to be or set to 1, respectively
• sread and fread without output argument, but not followed by a semicolon, corrupted the operand stack; fixed
• sread, fread, swrite, and fwrite with 'uint32' produced garbage; fixed
• trace with a complex argument gave a wrong result; fixed
• where both functions and statements were valid (e.g. at the command prompt), code fragments beginning with "use" were always identified as statements; fixed
• rot90([]) produced a division by zero and crashed on some platforms; fixed

Libraries

• lti: ss(transfer function) was broken in 2.2.1; fixed
• lti: transfer function may be displayed as functions of backward shift q^-1 or z^-1 by setting the variable to q^-1 or z^-1

SQ files

• ARW.sq, demogr.sq, gravity.sq, MPT.sq, PID_ct.sq, PID_dt.sq, RST_ct.sq, RST_dt.sq, salesman.sq: use of built-in function "not" as menu handler

Sysquake 2.2.1

SysQuake

• dbodemag and dbodephase couldn't have output arguments; fixed

LME

• since version 2.2, x(index)=y set only the real part if x was complex and y was real; fixed
• on some platforms, x([])=[] crashed when x was []; fixed
• built-in functions which returned 0 or more output arguments can now force the output of an argument when no output is requested; for example "feval(@sin,2)" without semicolon gives 0.9093, which is assigned to variable "ans" and displayed, while "feval(@format,'j')" doesn't produce any output
• for objects, o(:,i) was evaluated like o(i,:); fixed
• structures aren't lists anymore, and aren't displayed as lists
• "end" can be overloaded for objects (syntax: n=C::end(a,k,nd))
• "subsasgn" can be overloaded for objects
• "beginning", symmetric of "end" for the first index, always 1 for arrays and lists but can be overloaded for objects
• spaces aren't supported anymore as element separators in lists (this wasn't documented)
• "define" is now supported in inline
• feval with a reference to a "define" and input arguments wasn't reported as an error and corrupted the argument stack; fixed
• subsref and subsasgn implemented for arrays and structures
• filter with arrays and with 2 output arguments
• fevalx
• text output is much faster on some platforms
• commands without output could be used in functions like fzero or ode45; fixed
• with objects in LME 2.1-2.2, a-b called minus(a,-b) instead of minus(a,b); fixed
• bitset

Libraries

• stdlib slightly simplified thanks to fevalx
• bitfield, a class for arithmetic on binary numbers

Sysquake 2.2

SysQuake

• SysQuake might crash when the init handler required more memory; fixed
• image now also accepts an m-by-n-by-3 array of RGB values instead of three m-by-n arrays for color images
• circle now accepts arrays of compatible sizes for x, y and r (compatible means equal or scalar, like scalar math functions such as atan2)

SysQuake (Mac)

• drawnow now opens the Figure window if it's hidden
• in Mac OS X, drawnow didn't flush the graphics; fixed

LME

• fread hasn't managed the stack correctly since 2.1; fixed
• sum, prod, mean, cumsum, cumprod, and reshape with two input arguments couldn't be overloaded to accept an object as first argument; fixed
• upper and lower have a result of type char
• new functions for arrays: ndims, flipdim, squeeze, cat, permute, ipermute
• support for arrays with more than 2 dimensions: acos, acosh, all, any, asin, asinh, atan, atan2, atanh, beta, betainc, betaln, bitand, bitcmp, bitget, bitor, bitshift, bitxor, cdf, ceil, char, conj, cos, cosh, cumprod, cumsum, diff, disp, double, dumpvar, elseif, end, erf, erfc, exp, fft, find, fix, fliplr, flipud, floor, fprintf, fwrite, gamma, gammainc, gammaln, if, ifft, imag, ind2sub, ischar, isfinite, isinf, isletter, isnan, isnumeric, isspace, length, log, log10, lower, max, mean, min, mod, nchoosek, ones, pdf, prod, rand, randn, real, rem, repmat, reshape, rot90, round, setstr, sin, sinc, sinh, size, sort, sprintf, sqrt, sub2ind, sum, swrite, tan, tanh, unique, upper, while, xor, zeros, +, -, .*, ./, .\, .^, *, /, \, ==, ~=, <, <=, >, >=, &, |, ~, ?:, ;, ,, all string arguments, array indexing for access, assignment and suppression
• sort (and functions such as median which use it) sometimes caused a memory access violation on some platforms; fixed
• exist with one argument didn't manage correctly the argument stack; fixed
• any and all with empty matrices produced a non-logical number; fixed
• new errors "Bad dimension", "Incompatible size of selection array", and "Wrong number of indices"
• fopen without 2nd input argument now really opens files in read-only mode
• support for expr.field, expr(indices), expr{index}, and end in these index expressions
• deal
• since 2.1, core builtin functions with a variable number of arguments (such as deconv) didn't report correctly the number of output arguments to functions like nargout or feval; fixed
• v{:} in function call input arguments
• join can be called without arguments ("join" or "join()" -> {})
• more functions can be defined in low memory conditions
• in statements like "for c='abc'", c is now of type char; the same is true for logical arrays
• asinh with a complex argument gave a wrong result; fixed
• in fprintf and sprintf, '%...s' where '...' were modifiers but didn't include the number of characters ('.n2'), only the first four characters were output; fixed
• when a "use" statement is issued from the command-line interface to force a reload of function definitions, definitions weren't reloaded when it was the first time the library was "use"d from the command-line interface; now definitions in libraries which were "use"d indirectly are also reloaded
• dumpvar can now be aborted

LME (Mac)

• errors when loading extensions are reported

SQ files

• filter.sq: much simplified thanks to a make handler
• triangul.sq: fixed

Libraries

• stdlib, support for arrays with more than two dimensions: cross, cumtrapz, hist, median, std, trapz
• stat, support for arrays with more than two dimensions: mad, moment, nanmean, nanmedian, nanstd, trimmean, var, zscore
• stdlib: subspace
• lti: tf::subsref with indices (such as "x=tf(1,2:3);x(1,1)") didn't work correctly; fixed

Sysquake 2.1

SysQuake

• bodemag and bodephase couldn't have more than 4 arguments, and dbodemag and dbodephase more than 5; now they can have up to 6 and 7 arguments, respectively, so that they accept the optional style and id arguments with state-space models
• some invisible changes to offer more flexibility for reusing the graphical architecture in other Calerga products
• plotoption nogrid/fullgrid had to be placed after sgrid/zgrid/ngrid/hgrid to have an effect; fixed
• bicubic interpolation for image with style = '3'
• dash and symbol type did reset the line thickness to thin (e.g. 'R_' gave a thin red line instead of a thick red line); fixed
• _nb was always 1 when multiple styles were specified in the circle command; fixed
• support for standard input (fd=0), which can be used with fscanf, fgets, fgetf, and fread
• improved functions margin and dmargin
• sliders with several thumbs
• hstep with a very small time step sometimes crashed; now it returns a memory overflow error
• loading SQ files without an input handler sometimes didn't give a correct result; fixed
• keydown handler
• undo didn't work correctly when no figure was displayed; fixed
• RGB color specification for graphics ('h(rrggbb)' or 'H(rrggbb)')

SysQuake (Mac)

• the resolution of the profiler has been improved from us to ns
• function "quit"
• basic support for the serial port on Mac OS X
• Paste in the Command window now puts the cursor at the end if the selection begins before the end of the prompt

SysQuake (Windows)

• .lml files are displayed in the Open dialog box
• Print and Print Preview are now always enabled for the figure panel
• default font size for figures is larger
• format preference got corrupted; fixed

LME

• some invisible changes to support mixing HTML in SysQuake Remote
• when there was not enough memory to extend the table of workspace variables, LME could theoretically hang; fixed
• functions fft and conv2 can now be interrupted
• library names in "use" statements weren't always decoded correctly when they were placed at the end of a code fragment; fixed
• setfield
• info with optional output argument
• new "info o" for operators ("info b" doesn't list operators anymore)
• dumpvar supports function references and binary data, such as longint when implemented
• nested ':' and '?' operators don't need parenthesis anymore; for instance, a:b:c:d = (a:b:c):d, a:b:c:d:e = (a:b:c):d:e, a?b?c:d:e = a?(b?c:d):e (all these expressions produced error "Wrong number of input arguments)
• orth, null, qr
• more than 3 input arguments or 2 output arguments could be given to fread and sread, with unpredictible results; fixed
• fscanf(format) with implicit fd=0 (stdin)
• fseek and ftell (brought from SysQuake and other LME-based applications)
• feof
• integer numbers displayed by disp (or because of the lack of a semicolon) in exponential notation because they were too large had no fractional part; fixed
• "format i" or "format j" to choose which symbol is used to display the imaginary part of a complex number
• when non-core built-in functions were called with the wrong number of arguments, the error was reported ambiguously as "Unknown variable or function"; now it's "Wrong number of input arguments" or "Wrong number of output arguments"
• dbstop('-interrupt') to enter debugging mode when the interrupt key is pressed (a 2nd press really interrupts functions like fft)
• when variable x is empty, x(:,logical), x(logical,:), x(:,logical)=[] and x(logical,:)=[] threw error "Incompatible size"; it doesn't anymore
• lu
• hess, schur, householder, householderapply
• fprintf and sprintf with empty matrices didn't give the expected result or crashed LME (access to address 0); fixed
• new error "Not enough memory" for memory overflows outside LME, to better track memory usage
• sqrtm, logm, funm
• eig now supports complex matrices

Libraries

• constants
• lti: rlocus, pzmap, margin, optional output arguments for graphical commands (like their non-lti versions)
• classes: operators == and ~= for classes polynom and ratfun; constructor for ratfun accepts polynom objects as arguments

SQ files

• PID_dt.sq and RST_dt.sq: the frequency line was displayed only for w < pi; fixed

Sysquake 2.0

SysQuake

• title
• redraw
• format options are saved and restored
• clf now resets the scale
• menu Views is disabled when no figure is declared
• dumpvar with 2 or 3 arguments didn't popped correctly the arguments, which caused problems in for loops; fixed
• in the dialog command, the backslash character in strings in now encoded as \\
• dumpvar now compresses ranges (e.g. dumpvar([3,1.1:4]) -> [3,1.1:3.1] instead of [3,1.1,2.1,3.1]), zeros (e.g. dumpvar([1,0,0,0,0,0,0,0]) -> [1,zeros(1,7)]), and constants (e.g. dumpvar(ones(1,10)*pi) -> [3.141592653589793*ones(1,10)])
• dumpvar supports struct
• in the style option string of graphic commands, each style is made of one (color or style) or two (color and style in any order) characters, and styles are recycled as before
• dialog didn't display correctly the default value '' (an empty string); fixed
• improved spacing of lines of text, sliders and buttons
• SQ files couldn't be loaded at all when a function was referenced somewhere but not defined; fixed (an error message is displayed in the Command window)
• hbar has been renamed barh
• in the list of arguments of bar and barh, x and w can be omitted even if a kind, a style and/or an identifier argument is present
• first argument of plot is now optional
• rlocus made robuster, especially with high-order systems
• the button and slider size is based on the font size
• mousedoubleclick handler
• _param for subplot-specific parameter
• mousedrag and mousedragcont handler may not be declared for the same figure anymore
• the figure wasn't redrawn when the scale command was executed from the command line; fixed
• the Options/Label menu entry is disabled for subplots which don't have a title
• X and/or Y grid
• menu "Views" renamed "Layout"
• the color of stacked bars was reversed; fixed
• import and export handlers, Special Paste and Special Copy
• cancel(false) to keep previous values of output variables in a mousedrag or mousedragcont handler, but continue the drag
• support for multiple instances: functions of each SQ files are defined in separate libraries and preserved, changes in in the underlying undo and handler architecture
• continuation characters "..." are also recognized in SQ file declarations
• click can be anywhere in sliders
• undefined SQ variables (those defined only by make handlers) aren't stored in SQD files anymore, and variables not defined in SQD files are left undefined to let make handlers do their job
• 3d sliders
• the cursor sometimes flickered between the plain cursor and the manipulation cursor when it was over a slider or a button and an idle handler produced graphics of varying size; fixed
• "scale lock" in a draw handler locks the scale as if the user chose the "Locked Scale" menu entry immediately after loading the SQ file
• figoptions frame/noframe/label/nolabel/grid/nogrid/fullgrid/xgrid/noxgrid /ygrid/noygrid in draw handlers to set the initial value of user options
• make handlers with literal numerical input arguments sometimes froze SysQuake; fixed
• when the scale is locked, resizing the subplots changes the scale in order to display always the same range; for subplots with an equal scale along x and y axis, ranges are changed in such a way that resizing back to the initial size resets the scale correctly
• toolbar and action menu entries are disabled when irrelevant
• clicks in non-interactive plots are discarded
• idlestate to change the on/off state of the idle handler programmatically
• settabs left its argument on the stack, which might sometimes cause problems; fixed
• in rare low-memory cases, settabs could have a buffer overflow; fixed
• settabs now accepts a numerical argument
• sliders might crash SysQuake when they were shorter than 64 pixels; fixed
• option to check for common design errors in SQ files
• preference dialog for startup commands (typically "use" commands)
• when function "eval" was called from a function which didn't define any variable, it had access to variables from the calling function; fixed
• (d)step, (d)impulse, (d)bodemag, (d)bodephase, (d)nyquist, and (d)nichols can be used with output arguments to obtain the coordinates of the plots
• line style such as ':', '-' and '!' approximated with patterns
• a comma cannot follow immediately keyword "variable" anymore
• _nondumpable attribute for SysQuake variables which cannot be dumped and restored with undo/redo/save/open (such as file descriptors for serial connections)
• bodemag and bodephase now accept a state-space model
• graphical commands such as step couldn't be used with a state-space model with no state (e.g. step([],[],[],1)); fixed
• commands "sigma" and "dsigma" for plotting the singular values of frequency responses
• commands "initial" and "dinitial" for plotting the time response of a state-space model with initial conditions
• in versions whithout a built-in source code editor, menu "Reload" to reload the current SQ file version after it has been edited in an extern text editor
• Save As EPS is now enabled for any figure window, not only for the output of an SQ file
• dialog now also accepts inline functions, structures and objects
• _param can now also be used in menu, import and export entries and their _enabled and _checkmark expressions
• Settings submenu in the figure popup menu
• figures with text, buttons and/or sliders have a fixed line spacing and can be scrolled up and down when more material is displayed that can fit

SysQuake (Mac)

• when the example in the Help menu was loaded, the menu entry in the Help menu for information about the current SQ file was "About"; now it's "About Example"
• inter-application copy/paste wasn't always handled correctly; fixed
• menus related to figures and SQ file are now disabled when the figure window isn't active
• menu "Plots" is completely disabled when all its entries are
• dialog boxes use the Appearance background color
• proportional scroll bars
• in figure windows, scrollbars weren't moved when the zoom box was clicked; fixed
• menus "Figure Window" and "Command Window" now expand windows if they were collapsed
• new shortcut Command-Shift-Z for redo, and removal of the arrow keys for undo/redo
• double-clicking SysQuake's icon in the Finder show the Command window if there aren't any other open window
• Select All for non-interactive plots is disabled
• when several subplots are selected, options which are set for some subplots and unset for other ones are marked with a dash in menus
• when the Command window was resized, its content was scrolled to top; fixed
• help message isn't displayed anymore for disabled buttons in the toolbar
• the first time SysQuake was launched, the display format (set with the "format" command) wasn't initialized correctly; fixed
• when loading pure functions, no figure window is opened, but the command window is shown
• the size of the Command window wasn't restored when its top left corner was less than 16 pixels away from the top or left borders; fixed
• when the selection started from the first character of the command line, it was impossible to delete it with the backspace key; fixed
• option for the default Appearance background in figure windows
• drag Appearance sound in figure windows

SysQuake (Windows)

• crashed when nonpositive data were plotted with a dB scale; fixed
• preference to change the figure font
• line thickness wasn't set correctly; fixed
• the terminate handler wasn't called when quitting SysQuake; fixed
• the abort key processing made keyboard input unreliable when an idle handler was called; fixed (the new interrupt key is now the standard Control-Break)
• memory preferences are better checked, and the minimum has been raised to 8 megabytes
• a menu separator was displayed at the top of the figure popup menu when there was no Plots or Settings submenu; fixed

SysQuake LE (Windows)

• serial ports left open weren't closed on quit; fixed
• button for save
• path preference

LME

• command "format"
• the colon operator sometimes missed the final value because of round-off errors (e.g. 1.1:0.1:1.2 -> 1.1); made much more robust
• some syntax errors (such as x(:3)) are now reported as "Unrecognized or unexpected token 'xxx'"
• when a name with more than 32 characters is found, the first 32 characters are reported in the error message
• errors during the execution of function "eval" weren't reported with the function name and line number; fixed
• when an error occured after a call to a user function in an expression, the function name and line number reported in the error message were wrong; fixed
• when an error occurs, a stack trace is displayed
• &&, ||, ? :
• the display of very small numbers hanged LME; fixed
• empty matrices in lists weren't displayed correctly; fixed
• empty strings in lists are now displayed as ''
• memory allocated for compiled functions was underestimated (overly conservative); fixed
• v{ix} didn't yield an error when v wasn't a list; fixed
• it's now possible to add a last element to a list variable with v{end+1}=el and to initialize a new variable to a list with v{1}=el
• structures with functions struct, isstruct, isfield, rmfield, fieldnames
• new error messages: "Too many nested subexpressions", "Variable table overflow", "Expression too large", "Too many nested (), [] and {}", "Too many nested programming structures"
• the number of variables which can be defined by a single command typed in the command line isn't limited anymore (previously, it was limited to 16)
• apply(f,list) didn't work when the list contained a number of elements such that f couldn't return the maximum theoretical number of output arguments (for instance apply('min',{2,3}), because min(2,3) can provide only one output arguments while min can have up to 2 output arguments); fixed
• the second argument of diff can now be [], which stands for the default value of 1
• for var=x1:x2 and for var=x1:xs:x2 now accept a complex x2
• sort doesn't change the order of identical elements anymore
• in sprintf and fprintf, * is recognized in the format string as the width or precision placeholder (one more argument or matrix element is consumed)
• fmin has been renamed fminbnd
• strcmpi
• isnumeric
• isstr has been renamed ischar
• quad
• new function entries aren't created anymore automatically for commands typed at the command-line prompt (unknown function names are usually errors)
• which
• name of undefined functions weren't reported correctly in the error message; fixed
• spaces weren't handled correctly as separators for lists of output arguments between []; fixed
• .\ was mapped to mldivide instead of ldivide; fixed
• kron
• sort without input nor output argument didn't through an error; fixed
• ss2tf now requires a fifth argument to specify the input if there are more than one input
• ss2tf didn't support ss systems without any state; fixed
• in fprintf and sprintf, %X didn't display uppercase hexadecimal; fixed
• bitshift didn't clean the stack correctly; fixed
• dumpvar with output argument
• source code is preserved by inline functions and is output by dumpvar
• info u
• sinc
• help for built-in functions, operators and commands, and Matlab-style help of user commands
• === as infix operator for same
• ~== (infix operator for unsame)
• when an error occured when pushing output arguments when returning from a function, variables were sometimes corrupted, which could later lead to a crash; fixed
• extension functions may now allocate any number of blocks of temporary memory, not necessarily after having pushed output arguments
• dumpvar now preserves the logical attribute
• with command "disp" and standard output, logical values are displayed as "true" or "false" for scalars, or as "T" or "F" for arrays
• display of large objects (such as rand(200)) can be interrupted
• flushdevice
• beta, betainc, betaln, erf, erfc, gamma, gammainc, gammaln, pdf, cdf, nchoosek
• sort with row vectors had a bug; fixed
• sort now has at least one output argument
• when allocating space for new variables, there might be a memory read from an invalid address, which caused problems on some platforms (Palm); fixed
• function references (@fun, str2fun('fun'), fun2str(funref), and support in feval, fzero, quad, disp, etc.)
• num2list, list2num, getfield
• max(M) and min(M) now return the first element when several of them have the same value
• nonnumeric arguments of diff and magic weren't rejected; fixed
• object support: functions "class", "isa", "isobject", and "methods"; method definitions with C-like syntax; function "struct" to cast objects to structures
• when memory allocated to LME was expanded, reference to undefined functions were corrupted; fixed
• quad: maximum number of step reductions reduced from 20 to 12
• map with any number of input and output arguments
• varargin, varargout
• error when a strcture field was set in a multiple-output assignment (e.g. (a.x, ...)=...); fixed
• error occuring after a try/catch block weren't always handled properly; fixed
• svd with 3 output args now returns by default a full m-by-n S, and an "economy-size" U and S with "false" as 2nd argument (compatible with Lapack version)
• deleting elements in a list with v(...)={} sometimes crashed; fixed
• user errors (thrown with "error") now generate an error message with a function name and a line number
• when some code was compiled during execution, the line number was changed and sometimes reported incorrectly if an error occured immediately afterwards; fixed
• the initial square barcket of an array couldn't be followed by a line feed; fixed
• a space couldn't follow the initial brace of a list; fixed
• in a list of variables for multiple output arguments, commas couldsn't be preceeded by spaces; fixed
• debugging functions dbclear, dbcont, dbhalt, dbquit, dbstatus, dbstep, dbstop, dbtype
• nargin('fun') and nargout('fun') didn't give the correct result when function fun hadn't been loaded; fixed
• for methods, the syntax 'class::method' is now accepted by nargin, nargout and which
• "which" now uses a slash instead of a colon as a separator between the library or type and the name
• built-in functions couldn't be redefined or overloaded with functions with a different number of arguments; fixed
• private functions in libraries (with new "private"/"public" keywords)
• function "balance"
• arguments of functions which evaluated another function (such as "apply") were corrupted when too large; fixed
• mod gave a wrong results with some arguments; fixed
• reshape with a single argument
• hasfeature
• fread which requested a large amount of data had a buffer overflow; fixed
• keywords else, otherwise, try and catch don't need anymore to be followed by a new line, a comma or a semicolon
• separated help files
• ode45 adaptive time step debugged and improved
• ode23 and odeset; improvements to ode45 (options Refine and Stats)
• clear('-f') to clear the definition of all functions
• new function optimset; fminbnd and fzero now use the result of optimset for their options
• functions which evaluate other functions, such as fzero and ode45, couldn't be interrupted when the evaluated function hadn't any loop; fixed
• define
• complete definitions with function and define can be typed at the command-line prompt to define top-level functions and constants in library "_cli"
• default input arguments in function definitions

Extensions

• LMELapack: (u,s,v)=svd(M,0) didn't produce a v with a size such that M=u*s*v'; fixed

SQ files

• most of them: use of && and ||
• image.sq: random generator used for dithering is reset to keep the same noise
• prewarping.sq merged with sampling.sq
• import/export handlers added where it makes sense

SysQuake LE

• fopen prints the warning "Low-level file I/O not supported"

Sysquake 1.3.1

SysQuake (Windows)

• when SysQuake was launched as the result of opening a document, the extensions weren't loaded; fixed

Sysquake 1.3

SysQuake

• loading a new SQ file doesn't clear the variables defined from the command-line interface anymore
• better ticks and more labels
• support for free-position subplots, with command subplotpos
• gray background
• bar and hbar now accept an empty size argument (e.g. bar([],1:5,[],'','r') to have red bars with default width)
• slider with 3 arguments (or empty 4th, 5th and 6th args) sometimes didn't display anything; fixed
• improved text array display
• several text and slider commands may be used and mixed in the same figure
• button command
• settabs command
• circle with a logarithmic scale made SysQuake hang; fixed
• in zoom or shift mode, now sliders and buttons can still be manipulated
• margin sometimes gave a wrong gain margin when there was an integrator; fixed
• the vertical bar in sliders was only partially drawn when it had the maximum value; fixed
• with a logarthmic scale, lines with negative coordinates were drawn at a random position; fixed (they aren't drawn anymore)
• variables were always set to empty arrays before the input handler was executed; now the values set by the init handler are preserved
• leading zeros in the polynomial arguments of graphic functions are now discarded
• multi-line C-like comments /* ... */
• in SQ files, the string right before the end of the file, if any, wasn't decoded correctly (e.g. an SQ file which contained 'figure "x"', without carriage return, produced an error); fixed
• make handlers with literal numerical input arguments weren't used; fixed
• bode, nyquist and nichols plots may now be used with non-causal transfer functions
• help messages in zoom, zoom x, drag and select mode when the cursor is over a figure
• thick lines (with uppercase color letters for the style parameter of graphic commands)
• color picker to choose the background color of the figure window
• option to have thicker lines
• spaces are not required anymore between keywords such as figure or menu and the string which followed them, and new lines found there are fine
• precision of c2dm(...,'zoh'), step, and impulse has been increased, thanks to the precision increase of poly(matrix)
• only one level of make handlers; now indirect dependancies are handled correctly
• c2dm and d2cm with state-space models
• the figure window wasn't updated when the label command was typed at the command line; fixed
• _idlerate and _idleamount to give hints on when to call the idle handler
• multiple init and terminate handlers are now permitted and executed sequentially
• in plot(X,Y,...), X or Y may be a row vector and the other one a matrix, the row vector being reused to match the size of the matrix; the same for line(A,b,...)
• in handler declarations, () is accepted as an empty list of input arguments
• in SQ files, ';' can now be used as declaration separators
• SysQuake can now read plain LME functions (without any SQ declaration)
• multiple declarations of elements such as input handlers or help block and misplaced declarations such as draw handler not following a figure declaration are flagged as errors
• less memory-greedy when loading large SQD files
• slightly faster when expanding memory allocation
• if there is no subplot command in the init handler (or no init handler), the first figure is displayed by default
• clf couldn't be used consistently in functions called from the command line; fixed
• command "drawnow", useful for benchmarks
• line([],[],...) produced an error; fixed
• step, dstep, impulse, and dimpulse now also accept a state-space model A,B,C,D
• impulse now checks strict causality (degNum < degDen or D = 0)
• the circle command didn't check for memory overflows; fixed
• the unique "SQ Extension" file has been replaced with multiple files in folder "LMEExt"
• handler declarations don't need an empty function y=set(x) to assign a variable to another one: y=x or y=integer is now accepted
• when looking for the object under the mouse cursor, images are ignored near lines and lines are ignored near points, which makes possible the selection of a point on a line
• automatic control example replaced with triangle.sq, and help message made less frightening
• any kind of LME object (except for inline functions) can now be stored in SQ variables, not only matrices
• dumpvar(expr) doesn't output the final end-of-line anymore, to make possible its use in a more complex expression
• dumpvar support for lists

SysQuake (Mac)

• in 1.2, the text windows were updated at each key stroke; fixed
• Undo/Redo weren't disabled when a text window was active; fixed
• small memory leak in open and save dialogs after a cancel; fixed
• the cursor was set even when the front window was not the figure window; fixed
• Show/Hide window menu entries have been replaced with Command Window and Close
• Font preference dialogs for the Command window and the text in figures
• close box to hide the figure window, and new menu entry (in the File menu) to show it
• the title of the figure window now indicates which SQ file is open
• when Save As SQ File was followed by Save, the SQ file was overwritten by an SQD file; fixed (now Save As SQ File disables Save)
• Save As SQ File now changes the file name referred by subsequent Save As
• after loading an SQ file without any figure, menu actions (click or shortcut) might crash; fixed
• SysQuake User Guide entry in the help menu to open Doc.htm in the preferred browser (as set in the Internet control panel)
• subplot margins now leave more room for labels

SysQuake (Windows)

• the figure window was erased before setting or option changes, which caused a bad visual effect; fixed
• the title optionally specified as the first argument of getfile and putfile is used
• lines were clipped when printing at high resolutions; fixed
• the mouse middle button (if any) is mapped to shift-left button
• subplot margins now leave more room for labels, especially for printing
• when the demo SQ file available in the Help menu was displayed, the help message was not set; fixed

LME

• depending on the device, fgets and fgetl might return an empty string when nothing was read; now they throw an end-of-file error
• new extension architecture, for two kinds of extensions: those written by the end user, with a callback system and many checks to limit the risks of crashing SysQuake, and those linked with LME functions for stack manipulation, which integrate closer with LME
• polyval(pol, []) gave pol instead of []; fixed
• multi-line C-like comments /* ... */
• polyder(scalar) gave an empty matrix; now it gives 0
• roots and poly cannot be used in dialogs anymore
• functions "feval", "tf2ss", "version"
• sort with two input arguments
• results of expressions typed in the command window are assigned to variable "ans"
• the sign of det was sometimes wrong; fixed
• command syntax (such as "clear a")
• arguments of clear weren't always decoded properly; fixed
• fprintf and sprintf %d displayed numbers x with -0.5 < x < 0 as -0; now the minus sign is discarded
• precision of eig(matrix) and poly(matrix) has been improved
• recursive calls are interruptible
• for non-core LME functions, the function name wasn't reported in the error message when there was too few or too many output arguments; fixed
• () is accepted as an empty list of input arguments
• when it exists, the first nargout of user functions is displayed and/or assigned to variable "ans" if the statement doesn't end with a semicolon
• "end" used in complicate index expressions was not always associated with the correct dimension; fixed
• functional form for all operators (or, and, le, lt, ge, gt, eq, ne, plus, minus, mtimes, mrdivide, mldivide, mpower, times, rdivide, ldivide, power, colon, not, uminus, uplus, ctranspose, transpose, horzcat, vertcat, colon)
• feval evaluated the built-in version of functions when they were redefined as a user function; now the overriding definition is used
• sscanf and fscanf ran forever when %d, %f, %g or %e ran into an unknown character; fixed
• integer numbers may be represented in hexadecimal by prefixing them with 0x, in binary by prefixing them with 0b, or in octal by prefixing them with 0
• extension based on LAPACK to replace, extend and add the following LME functions: balance, chol, det, eig, hess, inv, logm, lu, \ (mldivide), / (mrdivide), orth, null, pinv, qr, rank, rcond, schur, sqrtm, svd
• empty function definitions (without function header) weren't reported as errors and led to crashes; fixed
• with complex variable v, v(:) = scalar real didn't reset the imaginaty part; fixed
• Frobenius norm of a matrix (option 'fro')
• inside [], binary operators such as + or * can now be surrounded by spaces (i.e. [1 + 2] is 3, [1 +2] is [1,2], and [1+ 2] is illegal)
• new functions tril, triu
• the empty string '' was aligned on the left margin; now it's indented by one space, like all other objects
• new read/write callback architecture for cleaner extensions (few visible effects for the end user)
• M^0 was wrong; fixed
• ones, zeros, eye, rand and randn with large negative arguments gave an out-of-memory error; fixed (->[])
• v(pred)=..., v(pred,:)=... and v(:,pred)=... with undefined v didn't result in inconsistent error; fixed
• some error messages concerning errors with variables and indices didn't contain the name of the variable; fixed
• findstr
• ode45, fzero, fmin
• inline, and feval changed to support inline functions
• nargin and nargout with an argument
• atan(literal real) wasn't optimized correctly; fixed
• lists ({...}, v(ix), v{ix}, v(ix)=..., v{ix}=..., join, apply, map, islist, support in switch and for)
• with complex z=0 (e.g. z=[0,1j];z=z(1);), z^x or z.^x -> nan; fixed

SQ files

• MPT.sq: clicking far away from any object produced an error; fixed
• RST_?t.sq/PID_?t.sq: when the cursor was over a frequency response, the mark in the Nyquist diagram caused an error with multiple models; fixed
• RST_?t.sq/PID_?t.sq: when the cursor was over a frequency response, the mark in the Nichols diagram was not wrapped the same way as the diagram itself; removed
• PID_?t.sq: choice of kp/Ti/Td or kp/ki/kd; set-point weighting b
• PID_dt.sq: derivative action filtering
• RST_?t.sq/PID_?t.sq: Y/W step response (W=input disturbance)
• RST_?t.sq: simplified thanks to a make handler
• settabs where needed for nicer columns of text and slider labels
• triangle.sq: altitudes, messages
• minesweeper.sq: mouseup handler instead of mousedrag, to avoid an artifact when choosing another set of mines when the initial click hits a mine
• salesman.sq: the river can be rotated by holding down the shift key, or put into automatic rotation mode for a nice demo
• relay.sq: the initial output and output derivative can be changed in the phase plane or the output response (output only)
• gravity.sq: uses the built-in ode45 function for integration, much better and faster than the ad hoc Runge-Kutta algorithm used before; new option to display the asteroid speed
• puzzle.sq discarded

Sysquake 1.2

SysQuake

• scale('lock',[xmin,xmax]) and scale('lock',[xmin,xmax,ymin,ymax]) in the draw handler set the locked scale, to be used when the limits imposed by SysQuake (max-min > 1e-6 for linear scales and max/min < 1e6 for logarithmic scales) cause problems
• "label" command (syntax: label('xlabel') or label('xlabel','ylabel') )
• bug when a make handler had to allocate more memory fixed
• too many labels were displayed when the lowest one was exactly on the plot lower limit (which was extremely unfrequent before the 'lock' option of scale); fixed
• nyquist and dnyquist of transfer functions with a (very) large gain entered an endless loop; fixed
• negative integers in handler declarations weren't accepted; fixed
• mousedragcont handler
• the figures weren't always refreshed after mouseout; fixed
• after a click in a figure which hadn't any mouse handler, the scale was blocked; fixed
• text-mode output didn't write end-of-lines correctly; fixed
• when several subplots were displayed, the graphic commands following clf on the command line didn't have any visible effect; fixed
• grid options weren't restored from an SQD file or a data block; fixed
• when executed from the command line, subplotprops didn't force a complete update of the graphics; fixed
• help system (help {@ ... @} in SQ files -> About SQ File in the help menu)
• when no init handler was defined, variable initialization (with a data block or an SQD file) was skipped and the idle handler (if any) wasn't executed; fixed
• "bar" and "hbar" commands (syntax: [h]bar(u, v, width, kind, style, id), with default u = 1:size(v,2), default width = [0.8,0.8], kind='grouped'(default), 'stacked', 'interval', default style='bfrfmfgfcfyfkf')
• no error message is displayed anymore when the init handler is cancelled
• _m was never set in the mousedown handler; fixed
• when (ok,var,...)=dialog(s,expr,...) was cancelled, garbage was left on the execution stack, which sometimes resulted in unexpected results, e.g. when in a for loop; fixed
• the cursor wasn't set correctly by mouseover handlers which had variables as output arguments; fixed
• new preference to display in red the frame around figures which can be manipulated interactively
• empty lines are not put into the history anymore
• in SQ files, the name right before the end of the file, if any, wasn't decoded correctly (e.g. if the whole content of the SQ file was "init x", without carriage return, the error was "Bad function definition" instead of "Undefined function 'x'"); fixed
• the built-in example of SQ file used in the help and when SysQuake is not registered has been updated to the latest version of RST_dt.sq (see below)
• with automatic scale and equal scales along x and y axis, when all the points lied on an horizontal or vertical line (e.g. with poles on the real axis), zoom was disabled; fixed
• the figures aren't updated anymore when Undo or Redo is attempted but fails because there is nothing to be undone or redone

SysQuake (Mac)

• in addition to Command-. and Control-C, the Esc key also interrupts execution
• clicks at the bottom of the Command window weren't discarded; fixed
• in the command window, left and right keys work in the read-only part, except that the left key doesn't allow to get over from the command line to the prompt; when text is typed while the cursor or selection is in the read-only part, the text is appended to the end of the command line

SysQuake (Windows)

• when the idle handler took longer than its time rate (100 ms), the user interface became extremely unresponsive; now at least 50 ms are left unbusy between idle handler calls
• when an SQ file was opened from the outside (double-click in the Windows Explorer etc.), SysQuake quit immediately; fixed
• when a dialog box was displayed by the init handler, the draw handlers were called and caused a reentrancy problem which sometimes led to a crash; fixed
• in the command panel, when text is typed while the cursor or selection is in the read-only part, the text is appended to the end of the command line

SysQuake Standard Extensions

• a crash might occur when the function called by callshlib didn't initialized correctly *out and *outSize and callshlib expected an output argument; fixed

SysQuake Demo

• Open has been removed
• timeout is reset when another SQ file is loaded
• edit window for the source code (read-only for built-in SQ files)
• possibility for the user to type her own SQ "file"

SysQuake Demo (Mac)

• countdown in the title bar

LME

• when an error occured when popping a stack frame at the end of a function, an attempt to display a variable name was made even when the variable names weren't available anymore; now "(return)" is displayed
• filter without state (e.g. filter(1,1,u)) was wrong; fixed
• new "Unknown option", "Bad function header", and "Function header expected" error messages
• sub2ind messed up the stack; fixed
• when M was a non-vector matrix, M(pred) = [] gave an error even when all elements of pred were false; fixed
• in addition to %, // is also recognized as the beginning of comments
• built-in commands accepting a variable number of input arguments but used without any input argument (such as char or fprintf) might crash; fixed
• clear
• bug with break or continue in try blocks inside loops fixed
• inside for or switch blocks, try...end (without catch) had a bug; fixed
• for complex variables, the imaginary part of v(pred) was garbage; fixed
• v(ind,[]) = expr through an error; fixed

SQ files

• RST_ct.sq: tuned Bode frequency range
• RST_ct.sq: same frequency range for the Bode magnitude and phase
• RST_ct.sq: system and controller phase in the Bode phase figure
• RST_ct.sq: the figure "Discrete-Time Step Resp. Y/D" didn't work; fixed
• PID_ct.sq: the figures "Discrete-Time Step Resp. ..." displayed debugging info; fixed
• many: make handler and numeric args in handler declarations
• RST_dt.sq, RST_ct.sq, PID_dt.sq, PID_ct.sq: no need to click over the sensitivities to display a frequency line; moving the mouse over them is enough
• PID_dt.sq: the mark at some frequency was wrong; fixed

Sysquake 1.1.1

Viewer and demonstrator only.

SysQuake

• undefined scale could sometimes lead to a crash; fixed
• "variables _implicit" for lazzy programmers
• make handler
• integer input arguments in handler declarations
• "content" keyword, without any effect yet

SysQuake (Windows)

• the space bar to interrupt LME execution has been replaced by the Esc or Pause keys

SysQuake Demo (Windows)

• SQ files embedded in the application, available in an Open submenu, like with the Mac version
• after June 2000, warning, but can still run

LME

• "syntax error" replaced with 12 new, more explicit messages
• for most run-time errors, the name of the offending function, operator, or variable is displayed

SysQuake Viewer (Windows)

• no more expiration date

SQ Signer 1.0.1 (Mac)

• version was still 1.0 fc2; fixed
• Navigation Services

Sysquake 1.1b

SysQuake demonstrator for Mac only.