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Color-interpolated patch legend is in full color instad of being interpolated

Asked by liomsi liomsi on 22 Mar 2019
Latest activity Commented on by liomsi liomsi on 27 Mar 2019
Hello,
I have a patch with a gradient color. Is there a way that this gradient color could be displayed in the figure legend (I don't want a color bar)?
Below is the code to reproduce the issue. I am on Matlab R2017a under mac os.
figure
patch([0 1 1 0],[0 0 1 1],[0 1 1 0],'FaceColor','interp')
legend('Why no interpolated colors here?')
I would like something which looks like this:
But the legend of the patch is full gray color:
Screen Shot 2019-03-22 at 13.38.27.png
Thank you for your help

  3 Comments

What do you want to appear in a legend, when the object does not have a specific color? A legend seems to be meaningless in this case.
I added an image (modified manually by adding a color bar over the legend) so that you can understand why I would like the gradient-color in legend.
Thanks
Yes, this is clear know. Thanks for the clarification.

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1 Answer

Answer by Jan
on 25 Mar 2019

The legend command is (one of) the most frequently modified function(s) of Matlab's toolboxes. You can access the contents of the legend by some undocumented methods, see https://undocumentedmatlab.com/blog/plot-legend-customization, but this has a certain leven of fragility, such that it will work with the current Matlab version only.
Please try, if one of the methods shown in this link can solve the problem.

  1 Comment

Thank you Jan.
So I understand there is no "normal" way to do it. It is disapointing that the legend color of a gradient patch cannot be a color gradient.
Your hacked solution seems quite complex to achieve what i want within a reasonable time, so I will do it by "photoshoping" it.

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