Creating pdf documentation images with Octave

[John W. Eaton]

On 28-Sep-2010, Rik wrote:

| Sometime ago we switched away from using Octave to generate the pdf images
| for the documentation to using ghostscript to render the eps into pdf
| format.  This was due to problems in the printing backend at the time.
| Have those issues been resolved and can we switch back?
| 
| I just sample checked a few of the images generated by plotimages.m in
| doc/interpreter and they seem to be created correctly.  Currently the eps
| and png formats are created from Octave and the pdf by the Makefile via
| ghostscript, but it would be nice to have the documentation printing be
| unified with everything produced by Octave.

I don't object to making this change.  Will we be using gnuplot or
gl2ps to generate the plots?  Which looks better?

jwe