Torquil Macdonald Sørensen <[email protected]> writes: > Hi! > > Using Petsc 3.4.4, compiled to support complex numbers, I'm getting a > completely white figure when plotting a matrix with purely imaginary > elements, using MatView(mat, PETSC_VIEWER_DRAW_WORLD). So I cannot see the > nonzero structure from the plot. > > For real matrices (still using the complex-enabled Petsc), I'm getting red > and blue points corresponding to positive and negative elements. > > Is it possible to get Petsc to show the nonzero elements of a complex > matrix, by checking the absolute values of each element?
If we use the absolute value, how would we distinguish positive and negative values? The complex version could make two plots.
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