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Library - colormaps
colormaps is a library containing functions related to color maps. Color maps are tables of colors which can be used with the colormap function; they are used by functions such as image and surf to map values to colors.
All functions accept at least the number of colors n as input argument, and produce an n-by-3 real double array which can be used directly as the argument of colormap. The default value of n is 256.
colormaps defines the following functions:
| Function | Description |
|---|---|
| black2orangecm | color shades from black to orange |
| black2red2whitecm | color shades from black to red and white |
| blue2greencm | color shades from blue to green |
| blue2yellow2redcm | color shades from blue to yellow and red |
| cyan2magentacm | color shades from cyan to magenta |
| graycm | gray shades from black to white |
| green2yellowcm | color shades from green to yellow |
| huecm | color shades from red to red through green and blue |
| interprgbcm | colormap created with linear interpolation |
| magenta2yellowcm | color shades from magenta to yellow |
| red2yellowcm | color shades from red to yellow |
| sepiacm | sepia shades |
| whitecm | plain white |
The following statement makes available functions defined in colormaps:
use colormaps
Functions are typically used directly as the argument of colormap:
colormap(blue2yellow2red);
Functions
black2orangecm
Colormap with shades from black to orange.
Syntax
use colormaps cm = black2orangecm cm = black2orangecm(n)
Description
black2orangecm(n) creates a color map with n entries corresponding to color shades from black to orange. The color map is an n-by-3 array with one color per row; columns correspond to red, green, and blue components as real numbers between 0 to 1 (maximum intensity). The default value of n is 256.
The color map is suitable as the input argument of colormap.
See also
colormap, black2red2whitecm, blue2greencm, blue2yellow2redcm, cyan2magentacm, graycm, green2yellowcm, huecm, interprgbcm, magenta2yellowcm, red2yellowcm, sepiacm, whitecm
black2red2whitecm
Colormap with shades from black to red and white.
Syntax
use colormaps cm = black2red2whitecm cm = black2red2whitecm(n)
Description
black2red2whitecm(n) creates a color map with n entries corresponding to color shades from black to red and white. The color map is an n-by-3 array with one color per row; columns correspond to red, green, and blue components as real numbers between 0 to 1 (maximum intensity). The default value of n is 256.
The color map is suitable as the input argument of colormap.
See also
colormap, black2orangecm, blue2greencm, blue2yellow2redcm, cyan2magentacm, graycm, green2yellowcm, huecm, interprgbcm, magenta2yellowcm, red2yellowcm, sepiacm, whitecm
blue2greencm
Colormap with shades from blue to green.
Syntax
use colormaps cm = blue2greencm cm = blue2greencm(n)
Description
blue2greencm(n) creates a color map with n entries corresponding to color shades from blue to green. The color map is an n-by-3 array with one color per row; columns correspond to red, green, and blue components as real numbers between 0 to 1 (maximum intensity). The default value of n is 256.
The color map is suitable as the input argument of colormap.
See also
colormap, black2orangecm, black2red2whitecm, blue2yellow2redcm, cyan2magentacm, graycm, green2yellowcm, huecm, interprgbcm, magenta2yellowcm, red2yellowcm, sepiacm, whitecm
blue2yellow2redcm
Colormap with shades from blue to yellow and red.
Syntax
use colormaps cm = blue2yellow2redcm cm = blue2yellow2redcm(n)
Description
blue2yellow2redcm(n) creates a color map with n entries corresponding to color shades from blue to yellow and red. The color map is an n-by-3 array with one color per row; columns correspond to red, green, and blue components as real numbers between 0 to 1 (maximum intensity). The default value of n is 256.
The color map is suitable as the input argument of colormap.
See also
colormap, black2orangecm, black2red2whitecm, blue2greencm, cyan2magentacm, graycm, green2yellowcm, huecm, interprgbcm, magenta2yellowcm, red2yellowcm, sepiacm, whitecm
cyan2magentacm
Colormap with shades from cyan to magenta.
Syntax
use colormaps cm = cyan2magentacm cm = cyan2magentacm(n)
Description
cyan2magentacm(n) creates a color map with n entries corresponding to color shades from cyan to magenta. The color map is an n-by-3 array with one color per row; columns correspond to red, green, and blue components as real numbers between 0 to 1 (maximum intensity). The default value of n is 256.
The color map is suitable as the input argument of colormap.
See also
colormap, black2orangecm, black2red2whitecm, blue2greencm, blue2yellow2redcm, graycm, green2yellowcm, huecm, interprgbcm, magenta2yellowcm, red2yellowcm, sepiacm, whitecm
graycm
Colormap with shades of gray.
Syntax
use colormaps cm = graycm cm = graycm(n)
Description
graycm(n) creates a color map with n entries corresponding to gray shades from black to white. The color map is an n-by-3 array with one color per row; columns correspond to red, green, and blue components as real numbers between 0 to 1 (maximum intensity). The default value of n is 256.
The color map is suitable as the input argument of colormap.
See also
colormap, black2orangecm, black2red2whitecm, blue2greencm, blue2yellow2redcm, cyan2magentacm, green2yellowcm, huecm, interprgbcm, magenta2yellowcm, red2yellowcm, sepiacm, whitecm
green2yellowcm
Colormap with shades from green to yellow.
Syntax
use colormaps cm = green2yellowcm cm = green2yellowcm(n)
Description
green2yellowcm(n) creates a color map with n entries corresponding to color shades from green to yellow. The color map is an n-by-3 array with one color per row; columns correspond to red, green, and blue components as real numbers between 0 to 1 (maximum intensity). The default value of n is 256.
The color map is suitable as the input argument of colormap.
See also
colormap, black2orangecm, black2red2whitecm, blue2greencm, blue2yellow2redcm, cyan2magentacm, graycm, huecm, interprgbcm, magenta2yellowcm, red2yellowcm, sepiacm, whitecm
huecm
Colormap with hue from red to red through green and blue.
Syntax
use colormaps cm = huecm cm = huecm(n)
Description
huecm(n) creates a color map with n entries corresponding to color shades with hue varying linearly from red back to red through green and blue. In HSV (hue-saturation-value) space, saturation and value are 1 (maximum). The color map is an n-by-3 array with one color per row; columns correspond to red, green, and blue components as real numbers between 0 to 1 (maximum intensity). The default value of n is 256.
The color map is suitable as the input argument of colormap.
See also
colormap, black2orangecm, black2red2whitecm, blue2greencm, blue2yellow2redcm, cyan2magentacm, graycm, green2yellowcm, interprgbcm, magenta2yellowcm, red2yellowcm, sepiacm, whitecm
interprgbcm
Colormap with entries obtained by linear interpolation.
Syntax
use colormaps cm = interprgbcm(i, r, g, b) cm = interprgbcm(i, r, g, b, n)
Description
interprgbcm(i,r,b,g,n) creates a color map with n entries. Color shades are interpolated between colors defined in RGB color space by corresponding elements of r, g and b, defined for input in i. These four arguments must be vectors of the same length larger or equal to 2 with elements between 0 and 1. Argument i must have monotonous entries with i(1)=0 and i(end)=1. The color map is an n-by-3 array with one color per row; columns correspond to red, green, and blue components as real numbers between 0 to 1 (maximum intensity). The default value of n is 256.
The color map is suitable as the input argument of colormap.
See also
colormap, black2orangecm, black2red2whitecm, blue2greencm, blue2yellow2redcm, cyan2magentacm, graycm, green2yellowcm, huecm, magenta2yellowcm, red2yellowcm, sepiacm, whitecm
magenta2yellowcm
Colormap with shades from magenta to yellow.
Syntax
use colormaps cm = magenta2yellowcm cm = magenta2yellowcm(n)
Description
magenta2yellowcm(n) creates a color map with n entries corresponding to color shades from magenta to yellow. The color map is an n-by-3 array with one color per row; columns correspond to red, green, and blue components as real numbers between 0 to 1 (maximum intensity). The default value of n is 256.
The color map is suitable as the input argument of colormap.
See also
colormap, black2orangecm, black2red2whitecm, blue2greencm, blue2yellow2redcm, cyan2magentacm, graycm, green2yellowcm, huecm, interprgbcm, red2yellowcm, sepiacm, whitecm
red2yellowcm
Colormap with shades from red to yellow.
Syntax
use colormaps cm = red2yellowcm cm = red2yellowcm(n)
Description
red2yellowcm(n) creates a color map with n entries corresponding to color shades from red to yellow. The color map is an n-by-3 array with one color per row; columns correspond to red, green, and blue components as real numbers between 0 to 1 (maximum intensity). The default value of n is 256.
The color map is suitable as the input argument of colormap.
See also
colormap, black2orangecm, black2red2whitecm, blue2greencm, blue2yellow2redcm, cyan2magentacm, graycm, green2yellowcm, huecm, interprgbcm, magenta2yellowcm, sepiacm, whitecm
sepiacm
Colormap with shades of sepia.
Syntax
use colormaps cm = sepiacm cm = sepiacm(n)
Description
sepiacm(n) creates a color map with n entries corresponding to shades of sepia. The color map is an n-by-3 array with one color per row; columns correspond to red, green, and blue components as real numbers between 0 to 1 (maximum intensity). The default value of n is 256.
The color map is suitable as the input argument of colormap.
See also
colormap, black2orangecm, black2red2whitecm, blue2greencm, blue2yellow2redcm, cyan2magentacm, graycm, green2yellowcm, huecm, interprgbcm, magenta2yellowcm, red2yellowcm, whitecm
whitecm
Colormap with plain white.
Syntax
use colormaps cm = whitecm cm = whitecm(n)
Description
whitecm(n) creates a color map with n identical entries corresponding to plain white. The color map is an n-by-3 array with one color per row; columns correspond to red, green, and blue components as real numbers between 0 to 1 (maximum intensity). The default value of n is 256.
The color map is suitable as the input argument of colormap.
See also
colormap, black2orangecm, black2red2whitecm, blue2greencm, blue2yellow2redcm, cyan2magentacm, graycm, green2yellowcm, huecm, interprgbcm, magenta2yellowcm, red2yellowcm, sepiacm