createcolormap
createcolormap.m
This function allows to create colormap Nx3 array (RGB) with an arbitrary combination of colors.
RGB values between the specified colors will be smoothly connected by linear interpolation.
Example
cmap = createcolormap(C);
cmap = createcolormap(n,C);
cmap = createcolormap(colorA, colorB);
cmap = createcolormap(n, colorA, colorB);
cmap = createcolormap(colorA, colorB, colorC, colorD, ...);
cmap = createcolormap(n, colorA, colorB, colorC, colorD, ...);
where n
is the number of segments for the output color scheme, and C
is the RGB matrix of color junctions.
Usage
-
blue-white-red (polar)
b = [0,0,1]; w = [1,1,1]; r = [1,0,0]; bwr = createcolormap(b,w,r); % 256x3 array colormap(bwr) colorbar
If you want to use dark blue and red colors, try below:
b = [0.0,0.0,0.5]; w = [1.0,1.0,1.0]; r = [0.5,0.0,0.0]; bwr = createcolormap(b,w,r); % 256x3 array colormap(bwr) colorbar
To create a more discrete color structure, input the number of elements in the first argument as shown below.
bwr = createcolormap(16,b,w,r); % 16x3 array
-
more complicated combination
colorA = [0.0,1.0,0.0]; colorB = [1.0,0.5,0.5]; colorC = [0.5,0.5,0.5]; colorD = [1.0,1.0,0.0]; cmap = createcolormap(64,colorA,colorB,colorC,colorD); % 64x3 array surf(peaks); colormap(cmap); colorbar;
-
RGB matrix
cmap = createcolormap(rand(10,3)); % 10 random colors surf(peaks); colormap(cmap); colorbar;
License
MIT
Author
Takuya Miyashita
Disaster Prevention Research Institute, Kyoto University
Update
v0.1 2021/10/01
v0.2 2021/10/09
Cite As
Takuya Miyashita (2024). createcolormap (https://github.com/hydrocoast/createcolormap/releases/tag/v0.2), GitHub. Retrieved .
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Platform Compatibility
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Version | Published | Release Notes | |
---|---|---|---|
0.2 | See release notes for this release on GitHub: https://github.com/hydrocoast/createcolormap/releases/tag/v0.2 |
||
0.1 |