gnuplot+octave+cygwin-X11

[John W. Eaton]

On 10-Oct-2005, Paul Kienzle wrote:

| Any idea how difficult it would be to extend octave/gnuplot to support 
| multiple figures natively?

The fix for Octave, independent of any changes to gnuplot, would be to
open a separate connection to gnuplot for each figure (i.e., one
gnuplot process per figure).  In the current sources, you'd need to do
this in the src/DLD-FUNCTIONS/gplot.l file.  Instead of

  // Pipe to gnuplot.
  static oprocstream *plot_stream = 0;

we might want

  // Pipe to gnuplot.
  static oprocstream *current_plot_stream = 0;

  std::map<int,oprocstream *> plot_stream_map;

to map figure numbers to plot stream objects.

The current figure.m should maybe become a built-in function that
handles opening plot streams and manages the plot_stream_map and the
variable __current_figure__.  Currently this variable is only defined
as a global in the scripting language, but that should probably become
a variable in gplot.l that is exported to the scripting language.

jwe