[petsc-users] Coloring of -mat_view draw

[Dave May]

On 5 September 2016 at 10:43, Justin Chang <jychang48 at gmail.com> wrote:

> Hi all,
>
> So i used the following command-line options to view the non-zero
> structure of my assembled matrix:
>
> -mat_view draw -draw_pause -1
>
> And I got an image filled with cyan squares and dots. However, if I
> right-click on the image a couple times, I now get cyan, blue, and red
> squares. What do the different colors mean?
>

Red represents positive numbers.
Blue represents negative numbers.

I believe cyan represents allocated non-zero entries which were never
populated with entries (explicit zeroes). Someone will correct me if I am
wrong here regarding cyan...

Thanks,
  Dave


> Attached are the images of the two cases:
>
> Thanks,
> Justin
>
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