![]() It contains the function colormapTestImage, which does all this for you. If you pass it the name of a colormap, it will display the test image using that colormap. For example, here is the test image with the old MATLAB default colormap, jet. Change Color Scheme Using a Colormap Copy Command MATLAB uses a default color scheme when it displays visualizations such as surface plots. This test image illustrates why we replaced jet as the default MATLAB colormap. You can change the color scheme by specifying a colormap. Colormaps are three-column arrays containing RGB triplets in which each row defines a distinct color. I have annotated the image below to show some of the issues. Now compare with the new default colormap, parula. I think that illustrates what we were trying to achieve with parula: perceptual fidelity to the data. Since I'm talking about parula, I'll finish by mentioning that we need some very subtle tweaks to parula in the R2017b release. Colormap to plot, specified as a three-column matrix of RGB triplets. So you can compare, I'll show you the original version that shipped with R2014b. An RGB triplet is a three-element row vector whose elements specify the intensities of the red, green, and blue components of a color. The intensities must be in the range 0, 1. For example, here is a colormap that contains five colors: This table lists the RGB triplet.
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