Colorbar and colormap scale

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S 2016-7-13

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https://ww2.mathworks.cn/matlabcentral/answers/295423-colorbar-and-colormap-scale

评论： S 2016-7-14

I am trying to add a colorbar to a series of images that contain colormap data. The best colormap for my data , for visual purposes is prism, but I have trouble with the scaling of the colorbar. I have gaze data, which I passed through a bivariate histogram and normalized them to percentages of the total gazes on the image. I select the colormap for my image (prism) and everything goes well. But trying to add a colorbar, produces inane results. In this example, the range of my colorbar is set with to: caxis([0 100]); If I change the range and make the caxis from 0 - maximum percentage in my matrix, still the result is equally wrong, only with changed values on the bar. I want my colorbar to reflect the colors in the image, but it seems the colorbar comes from another colormap. In my code I first call the function that creates the image and then the colorbar and the caxis command. Am I missing something? :S

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Walter Roberson 2016-7-13

That certainly isn't a colorbar for prism.

Please show your colorbar() call

S 2016-7-14

在 MATLAB Online 中打开

The problem is solved. I was getting the colormap through a dialogue, and when I later created the colorbar, it was the default colorbar. So the solution was this:

showmap(rgb,zvalues,colorfun)
  %create colorbar with range 
  colormap(colorfun);
  h=colorbar('southoutside');
where "colorfun" is the colormap defined from the dialogue box