If you just need rgb plotted on a 2d chart then PDL::Graphics::TriD has imagrgb which claims to do this.

The documentation mentions imag2d which I found in PDL::Graphics2D.

In reply to Re^3: 2d contour plot using Chart::Gnuplot by Lotus1
in thread 2d contour plot using Chart::Gnuplot by Ppeoc

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