Re: Strange behavior when printing plots in eps

[Ben Abbott]

On Apr 2, 2012, at 5:02 AM, Moreno Marzolla wrote:

> Hello everybody,
> 
> I am experiencing a different behavior of Octave 3.2.3 and 3.6.1 when saving 
> plots as a b/w eps file. Before submitting a bug report I would like to check 
> if this is intended.
> 
> Consider the following code:
> 
> x = 1:10;
> plot(x,3*sqrt(x),";First;",x,2*sqrt(x),";Second;",x,sqrt(x),";Third;");
> print("test.eps","-deps2","-mono","-debug");
> 
> Using Octave 3.2.3 as shipped with ubuntu 10.04, I get that the three curves 
> have different linestyle (solid, dashed, dotted). Using octave 3.6.1 (which I 
> compiled myself, again under ubuntu 10.04), I get all solid lines both with 
> the gnuplot and with the fltk backend. At the moment I cannot check if this 
> happens with a recent tip also.
> 
> Looking at octave-print-commands.log which is produced by the "-debug" option 
> above, I see that Octave 3.2.3 inserts this:
> 
> ...
> set style line 1 default;
> set style line 1 linewidth 0.500000 pointsize 1.000000;
> set style line 2 default;
> set style line 2 linewidth 0.500000 pointsize 1.000000;
> set style line 3 default;
> set style line 3 linewidth 0.500000 pointsize 1.000000;
> ...
> 
> while Octave 3.6.1 inserts this:
> 
> ...
> set style line 1 default;
> set style line 1 linetype 1 linewidth 0.500000;
> set style line 2 default;
> set style line 2 pointsize 2.000000;
> set style line 2 default;
> set style line 2 linetype 1 linewidth 0.500000;
> set style line 3 default;
> set style line 3 pointsize 2.000000;
> set style line 3 default;
> set style line 3 linetype 1 linewidth 0.500000;
> set style line 4 default;
> set style line 4 pointsize 2.000000;
> ...
> 
> The problem seems caused by the fact that all styles are defined with 
> "linetype 1" (there are also redundant "set style line X default").
> I can get the old behavior by manually setting the line styles as follows:
> 
> x = 1:10;
> plot(x,3*sqrt(x),"-;First;",x,2*sqrt(x),"--;Second;",x,sqrt(x),":;Third;");
> print("test.eps","-deps2","-mono","-debug");
> 
> Is this behavior intended?
> 
> Thanks,
> 
> Moreno.

Looks like a bug. Please file a report.

        https://savannah.gnu.org/bugs/?group=octave

Ben