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comparison scripts/plot/__gnuplot_open_stream__.m @ 9113:4bb94a71913b

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__gnuplot_open_stream__.m: New function and its application.
author Ben Abbott <bpabbott@mac.com>
date Sun, 12 Apr 2009 20:40:53 -0400
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children ff8d7f3ad203 fe30458b1de8
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9112:f5b51f54f44e 9113:4bb94a71913b
1 ## Copyright (C) 2009 Ben Abbott
2 ##
3 ## This program is free software; you can redistribute it and/or modify
4 ## it under the terms of the GNU General Public License as published by
5 ## the Free Software Foundation; either version 2 of the License, or
6 ## (at your option) any later version.
7 ##
8 ## This program is distributed in the hope that it will be useful,
9 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 ## GNU General Public License for more details.
12 ##
13 ## You should have received a copy of the GNU General Public License
14 ## along with Octave; see the file COPYING. If not, see
15 ## <http://www.gnu.org/licenses/>.
16
17 ## -*- texinfo -*-
18 ## @deftypefn {Function File} {@var{stream}} __gnuplot_open_stream__ (@var{npipes}, @var{h})
19 ## Undocumented internal function.
20 ## @end deftypefn
21
22 ## Author: Ben Abbott <bpabbott@mac.com>
23 ## Created: 2009-04-11
24
25 function plot_stream = __gnuplot_open_stream__ (npipes, h)
26 cmd = gnuplot_binary ();
27 if (npipes > 1)
28 [plot_stream(1), plot_stream(2), pid] = popen2 (cmd);
29 if (pid < 0)
30 error ("__gnuplot_open_stream__: failed to open connection to gnuplot.");
31 endif
32 else
33 plot_stream = popen (cmd, "w");
34 if (plot_stream < 0)
35 error ("__gnuplot_open_stream__: failed to open connection to gnuplot.");
36 endif
37 endif
38 if (nargin > 1)
39 set (h, "__plot_stream__", plot_stream);
40 endif
41 endfunction