Re: Print Plot Results in all Black plot in file

[address@hidden]

--- address@hidden wrote:
> On 08/03/15 16:33, Markus Appel wrote:
> > On 08/04/2015 12:40 AM, Mike Miller wrote:
> >> On Mon, Aug 3, 2015 at 15:34:22 -0700, Thomas D. Dean wrote:
> >>> When I open sin.png with eog, the axis labels are OK, but, the
> >>> plot is just a black square.
> >>>
> >>> I have something set wrong, but, what?
> >>
> >> Nope, it's
> >>
> >>> G N U P L O T Version 5.1 patchlevel 0    last modified
> >>> 2015-07-11
> >>
> >> It's a known bug, see http://savannah.gnu.org/bugs/?42838.
> >>
> >> I don't remember if there's a viable patch on that bug report yet
> >> or what the status is.
> >>
> >> You can downgrade to gnuplot 4, that works for me. Or use the
> >> other toolkits if you can.
> >>
> >
> > I have had this 'black-squares-over-my-plots'-problem as well for some
> > time, but could not find the time and motivation (yet) to get to the
> > bottom of it.
> > As workaround for the time being I suggest trying -dpngcairo or
> > -dpdfcairo as print terminal, works for me.
> >
> > _______________________________________________
> > Help-octave mailing list
> > address@hidden
> > https://lists.gnu.org/mailman/listinfo/help-octave
> >
> 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?
> 
> Tom Dean
> 
Current octave is not fully compatible with gnuplot 5 later.  As Mike wrote, 
please use gnuplot 4.6 at the moment.

AFAIK, you are using ubuntu, right?  

For my ubuntu, I am using gnuplot 4.6.7 only for octave, which is installed 
from source to /opt/gp467.  I set gnuplot_binary /opt/gp467/bin/gnuplot in 
~/.octaverc.

HTH 

Tatsuro