On 01/04/14 16:41, Jed Brown wrote: > 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.
Yes, that would be very useful.
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