Strange artefact line on color with nans

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Dimitri on 20 Nov 2014

Closed: MATLAB Answer Bot on 20 Aug 2021

When I run these lines under Matlab 2014a:

Z=rand(200); Z(idx(1:5000))=nan; pcolor(Z); shading flat axis equal axis([1 200 1 200]);

I get strange artefact lines on my plot. What is the explanation and how can I get rid of those lines?

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