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error: __gnuplot_get_var__: stream to gnuplot not open
From: |
Ben Abbott |
Subject: |
error: __gnuplot_get_var__: stream to gnuplot not open |
Date: |
Tue, 7 Apr 2009 10:07:26 -0400 |
On Apr 6, 2009, at 5:10 PM, Ben Abbott wrote:
On Monday, April 06, 2009, at 04:50PM, "Michael D. Godfrey" <address@hidden
> wrote:
A few comments on __gnuplot_default_font__.m:
At line 65 it reads:
error ("__gnuplot_get_var__: Can not open fifo (%s)", msg);
This should read ... Can not make fifo...
At line 85 it reads:
error ("__gnuplot_get_var__: Can not open fifo (%s)", msg);
This should read ... s)", err);
There is no string msg returned by fopen.
Do you know which of these errors is what you have been getting?
Michael
I have no idea which line is responsible. I'll change the errors and
push the change this evening.
Ben
With the changes in place, it is apparent that the plot_stream is not
open. Meaning the figure property "__plot_stream__" is empty.
octave:1> close all; clear all; rehash; plot (1:10); terms =
__gnuplot_get_var__ (gcf, "GPVAL_TERMINALS")
error: __gnuplot_get_var__: stream to gnuplot not open
error: called from:
error: /Users/bpabbott/Development/Octave_Toolbox/
__gnuplot_get_var__/__gnuplot_get_var__.m at line 45, column 5
Trying a second time ...
octave:1> close all; clear all; rehash; plot (1:10); terms =
__gnuplot_get_var__ (gcf, "GPVAL_TERMINALS")
terms = aqua canvas cgm corel dpu414 dumb dxf eepic emf emtex epslatex
epson_180dpi epson_60dpi epson_lx800 fig ggi gif gnugraph gpic hp2623A
hp2648 hp500c hpdj hpgl hpljii hppj imagen jpeg latex lua mf mif mp
nec_cp6 okidata pbm pcl5 pdf pdfcairo png pngcairo postscript pslatex
pstex pstricks qms regis rgip starc svg tandy_60dpi tek40xx tek410x
texdraw tgif tkcanvas tpic uniplex unknown vttek wxt wxtp x11 xlib
To track down further, I removed the ";" at the end of the popen2
statement in gnuplot_drawnow (open_gnuplot_stream)
114 [plot_stream(1), plot_stream(2), pid] = popen2 (cmd)
Now I get ...
octave:4> close all; clear all; rehash; plot (1:10); terms =
__gnuplot_get_var__ (gcf, "GPVAL_TERMINALS")
error: __gnuplot_get_var__: stream to gnuplot not open
error: called from:
error: /Users/bpabbott/Development/Octave_Toolbox/
__gnuplot_get_var__/__gnuplot_get_var__.m at line 45, column 5
error: /Users/bpabbott/Development/Octave_Toolbox/
__gnuplot_get_var__/go.m at line 1, column 49
plot_stream = 4
plot_stream =
4 5
pid = 44789
I should mention that for some Octave sessions this does not occur,
and in other it only occurs once. To make it repeatable, I placed the
sequence of commands in script file and ran it.
It appears that the figure property, "__plot_stream__", does not
immediately set. If I add a check and issue a "drawnow" ...
39 if (numel (h) == 1 && isfigure (h))
40 ostream = get (h, "__plot_stream__");
41 if (isempty (ostream))
42 drawnow;
43 ostream = get (h, "__plot_stream__");
44 endif
45 else
46 ostream = h;
47 endif
... then I get no error. If "drawnow" is replaced by "pause(0)" all
works as well.
This looks like a bug to me.
John, can you confirm or explain?
Ben
- error: __gnuplot_get_var__: stream to gnuplot not open,
Ben Abbott <=