Creates a broad range color map that looks good in color as well as when reduced to grayscale for low cost publication.
Finished colormap encodes small values with a bluish color, intermediate values in green to orange, and large values with a redish/salmon color. The greyscale is linear.
Alexandre Tumlinson (2023). colorGray (https://www.mathworks.com/matlabcentral/fileexchange/12804-colorgray), MATLAB Central File Exchange. Retrieved .
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input 'numberOfLevels' is now optional. Optimized for speed and readability by vectorizing code. Added the debug plotting options.
Thx to PederAxensten for suggestions and significant code snippet.