[Octave-bug-tracker] [bug #42838] gnuplot 5.0 print gives black plots

[Michael Godfrey]

Follow-up Comment #20, bug #42838 (project octave):

Below are the lines in:
__go_draw_figure__.m
that causes the black plots.
++
      bg = get (h, "color");
      if (isnumeric (bg))
        fprintf (plot_stream, "set obj 1 rectangle from screen 0,0 to screen
1,1 behind fc rgb "#%02x%02x%02x" fs solid nobordern", round (255 * bg));
--

It is the fprintf that causes the problem. Does anyone know
the purpose of this text in the gnuplot input?  
For simple plots the result appears
correct without this line in the input.

I will take a look at the gnuplot Manual to determine what this
line is supposed to do.

It appears that gnuplot 5.0 interpretes this line differently
from gnuplot 4.


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