help in capturing matrix patterns to files

[Satish Balay]

There are already tools to do get this dump

xwd | xpr -device ps > foo.ps
[now when the curser changes - click on the window to be dumped]

xv 
[use the grab option, and then save as tiff/jpg/ps format]

Perhaps there are other tools that can be used. Hence there is
no extra tools in PETSc to do the capture part.

Satish

On Thu, 4 May 2006, Harald Pfeiffer wrote:

> Hello,
> 
> That's a pity that this is not implemented.  As soon as I saw Razi's question,
> I thought that this would be a really useful feature.  I have found myself
> many times saying in talks that my matrix is non-symmetric for this-or-that
> reason.  Having a picture of the matrix to make the point would be very
> powerful.
> 
> I guess, outputting a picture with as many pixels as the matrix-size in a
> non-compressed format (tiff?) should be straightforward: You iterate through
> all matrix entries, if the entry is non-zero, you output "1", otherwise "0".
> You could even output different colors depending on the size or sign of an
> entry.  This will result in huge files, but any image-software should be able
> to down-size and convert to more efficient formats.
> 
> Harald
> 
> 
> Matthew Knepley wrote:
> > There is nothing built into PETSc to do this. It is also X-Windows
> > render commands inside. I used a screen capture program on
> > the Window it pops up.
> > 
> >   Thanks,
> > 
> >      Matt
> > 
> > On 5/4/06, *abdul-rahman at tu-harburg.de <mailto:abdul-rahman at tu-harburg.de>*
> > <abdul-rahman at tu-harburg.de <mailto:abdul-rahman at tu-harburg.de>> wrote:
> > 
> >     Hi all,
> > 
> >     I'd appreciate if anyone can point to a tutorial/example on how to
> >     direct
> >     the matrix pattern plot (one with -mat_view_draw) to a file
> >     (preferrably
> >     PNG for presentation and postscript for publications)
> > 
> >     I want to be able to capture the patterns in monochrome and also
> >     resize
> >     the graphics size.
> > 
> >     Thanks so much.
> > 
> > 
> >     Razi
> > 
> > 
> > 
> > 
> > -- 
> > "Failure has a thousand explanations. Success doesn't need one" -- Sir Alec
> > Guiness 
> 
>