change the Background color from the colormap of the polarPcolor function

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Hi, I use
the polarPcolor function:
However, I have problems to change the background color of the generated plot. Unfortunately, the color for the zero values are the same of the backgroundcolor independently of the colormap I have used.
Any idea?
Best regards,
CSCh on 20 May 2022
Yes, but thats helps me not, the background color is always connected to the zero value of the colormap inside this function. My polar plot is not complete filled, therefore it is hard to distinguish between zero values and empty areas.

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