From bug-request at octave dot org Thu Jan  5 08:30:14 2006
Subject: Re: gnuplot gset
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: "Sean O'Rourke" <sorourke at cs dot ucsd dot edu>
Cc: bug at octave dot org
Date: Thu, 5 Jan 2006 09:29:58 -0500

On  5-Jan-2006, Sean O'Rourke wrote:

| Thanks.  Can we keep it as a function that takes a single string
| as argument and lexes that instead of implicitly quoting the
| entire command line?  e.g.
| 
|     gnuset("term post eps font \"Palatino\" ... ");
|     gnuplot("x as linesp, y as points pt 3");

Yes, I think you can define your own functions that do this.  I don't
think gnuset is a good name though (seems to imply some connection to
GNU, when there is none).

| It seems like it should be easy to shove the string through the
| existing lexer, but I'm not at all familiar with that part of
| Octave.

I think the following will work

  function xgset (s)
    evalin ("base", sprintf ("__gnuplot_set__ %s", s));
  endfunction

  function xgplot (s)
    evalin ("base", sprintf ("__gnuplot_plot__ %s", s));
  endfunction

| One way to get back the original functionality from this would be
| to have a "mark_as_�,A|(Bbercommand" that would pass the entire
| unevaluated line to the command function (possibly after joining
| continuation lines).

Please see the mark_as_rawcommand function that is in 2.9.x,
specifically to support the implementation of the current
__gnuplot_set__, __gnuplot_plot__, etc. functions.

| I don't really care if this feature is left
| out, but at least having the single-string versions would be
| worthwhile.

I have no plans to add functions like this to Octave.

jwe



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