Creating a custom colormap with a specific range of colors
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Hello. I have written a code that creates a matrix filled with values ranging from -127 to 127 and distributed like a sinusoid. The imagesc function creates an image like the one I attached. Now I need to make a colormap so that I can input 2 variables that let me change the colors so that if I take a (for example) -50 to 50 range the image would start and end with shades of gray (-127 is supposed to be always black, 127 should always be white and the shades of gray are supposed to be taken from this range). Any help regarding the creation of the colormap, as I've had some problems with it myself, would be appreciated.