MATLAB: How to creat new colormap with new colorbar and then How to use it through the CODE

colorbarcolormap

 I want three basic colors which are Brown, Yellow and Green then want to be able to create an algorithm to scale these to a number of variants depending on the size of the colormap. Is there any basic way to do this?

Best Answer

call colormapeditor() within matlab and create the colormap that you want.

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MATLAB: How to create a white image

Try this to create a grayscale image:

whiteImage = 255 * ones(N, M, 'uint8');
imshow(whiteImage);

To create an RGB image, try this:

whiteImage = 255 * ones(480, 640, 3, 'uint8');
imshow(whiteImage);

MATLAB: Rescaling colormap/colorbar

If you get a handle to the colorbar, then you can set the y limits of the colorbar axis. This will allow you to show only the colors you wish on your colorbar. See my sample code below.

newmap = [zeros(256, 3); jet(256)];
colormap(newmap)
surf(peaks(30))
h = colorbar;
set(h,'Ylim',[1 8])

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Related Solutions

MATLAB: How to create a white image

MATLAB: Rescaling colormap/colorbar

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