Periodic hsv surf color

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Gabri 2018-6-8

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https://ww2.mathworks.cn/matlabcentral/answers/404807-periodic-hsv-surf-color

评论： Image Analyst 2018-6-9

Is it possible to set hsv colormap in order to get a periodic changing color? The hsv that I'm using right now starts from red, then pink, blue, green yellow and red again while I would like to have a periodic repetition of colors, something like red, pink, blue, green, yellow, green, blue, pink, red.

This is particularly helpful when you try to plot angles. In my case for example I plot (using surf 2d) a field's angle that goes from -pi to pi but using hsv colormap I see a color jump between -pi and pi even if they represent the same amount.

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Answer 1

Image Analyst 2018-6-8

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ColorOrder_demo.m

hsv() is a built-in colormap. I suggest you don't change it. However you can build your own colormap that can have unique colors, colors in a gradient, or ranges of colors that repeat. See attached demo.

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Gabri 2018-6-8

Is there a tool similar to colormapeditor that generates automatically the new colormap giving me the correspondent code?

Image Analyst 2018-6-9

There are lots of functions that generate colormaps, like hsv(), jet(), summer(), winter(), etc. Or you can invent your own. Then you can use the N by 3 array to set the axes's colormap, or you can use it to replace the default color order like my demo did.

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