Re: Print Plot Results in all Black plot in file

[Thomas D. Dean]

On 08/04/15 00:16, Dmitri A. Sergatskov wrote:
> On Tue, Aug 4, 2015 at 12:41 AM, Thomas D. Dean <address@hidden
> <mailto:address@hidden>> wrote:
>
>
>     I am struggling thru the code for print.
>
>     Is there a global value that can be set to control the output of print.
>
>     octave:> z=1:.1:pi;
>     octave:> plot(z,sin(z));
>     octave:> print("sin.png","-dpngcairo");
>
>     works.
>
>     Without -dpngcairo opts.devopt gets set to "-dpng" and print
>     produces a black square.
>
>     It looks like the opts structure is passed to gnuplot in
>     __gnuplot_print__.m.  As a work-around, I patched this file to force
>     pngcairo.  Not a solution, just makes lots of scripts work, again.
>
>     I don't see any global mechanism to set a default print device.
>
>     True?
>
>
>
> ​A quick and dirty hack is to add a line
>
> ​ if (strfind (opts.devopt, "png")) opts.devopt = "pngcairo" ; endif
>
> near the top of function print in "print.m"
>
> (while you at it you can also similarly override pdf with pdfcairo
>    (and postscript with epscairo, but that require some extra
> modifications))

Thanks, that is a better temporary fix than mine.  I want to stay with 
gnuplot 5.1 for other reasons.  So far, after making the patch, I have 
not found any problems.

> hg diff
diff -r 011a364b4d78 scripts/plot/util/print.m
--- a/scripts/plot/util/print.m Fri Jun 05 15:51:04 2015 -0400
+++ b/scripts/plot/util/print.m Tue Aug 04 00:50:01 2015 -0700
@@ -287,6 +287,14 @@

   opts = __print_parse_opts__ (varargin{:});

+  if (strfind (opts.devopt, "png"))
+    opts.devopt = "pngcairo" ;
+  elseif (strfind (opts.devopt, "pdf"))
+    opts.devopt = "pdfcairo" ;
+  elseif (strfind (opts.devopt, "eps"))
+    opts.devopt = "epscairo" ;
+  endif
+
   opts.pstoedit_cmd = @pstoedit;
   opts.fig2dev_cmd = @fig2dev;
   opts.latex_standalone = @latex_standalone;

Tom Dean