Circular mask for pcolor plot

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Bhowmik.U
Bhowmik.U am 7 Jan. 2021
I have a matrix
A=50*50
B=pcolor(AA);
I wish to plot pcolor such that values within a circular zone are retained ; and those out of it are masked.
The circular zone must have the centre as the centre of the matrix A and radius as 25 pixes (since A is 50*50 pixels)
Kindly help!

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