--- a/src/ChangeLog	Wed Nov 15 18:00:27 2006 +0000
+++ b/src/ChangeLog	Wed Nov 15 20:03:18 2006 +0000
@@ -1,3 +1,17 @@
+2006-11-15  John W. Eaton  <jwe@octave.org>
+
+	* DLD-FUNCTIONS/__gnuplot_raw__.l (write_data, write_inline_data):
+	New functions.
+	(save_in_tmp_file): Use write_data.
+	(gnuplot::send_inline_data, gnuplot_do_send_inline_data):
+	New functions.
+	(F__gnuplot_send_inline_data__, F__gnuplot_save_data__):
+	New functions.
+
+	* ls-oct-ascii.cc (save_ascii_data_for_plotting):
+	Call save_ascii_data with precision = 4.
+	(save_three_d): Temporarily set precision to 4 for output stream.
+
 2006-11-15  Michael Goffioul  <michael.goffioul@swing.be>
 
 	* Cell.h (Cell): Tag class with OCTINTERP_API.

--- a/src/DLD-FUNCTIONS/__gnuplot_raw__.l	Wed Nov 15 18:00:27 2006 +0000
+++ b/src/DLD-FUNCTIONS/__gnuplot_raw__.l	Wed Nov 15 20:03:18 2006 +0000
@@ -643,8 +643,38 @@
   return Vgnuplot_command_axes + " " + read_until (plottok_or_end_p, lasttok);
 }
 
+static void
+write_data (std::ostream& os, const octave_value& val,
+	    int ndim = 2, bool parametric = false,
+	    const std::string& name = std::string ())
+{
+  switch (ndim)
+    {
+    case 2:
+      save_ascii_data_for_plotting (os, val, name);
+      break;
+
+    case 3:
+      save_three_d (os, val, parametric);
+      break;
+
+    default:
+      gripe_2_or_3_dim_plot ();
+      break;
+    }
+}
+
+static void
+write_inline_data (std::ostream& os, const octave_value& val,
+		   int ndim = 2, bool parametric = false)
+{
+  write_data (os, val, ndim, parametric);
+  os << "e" << std::endl;
+}
+
 static std::string
-save_in_tmp_file (const octave_value& t, int ndim = 2, bool parametric = false)
+save_in_tmp_file (const octave_value& val, int ndim = 2,
+		  bool parametric = false)
 {
   std::string name = file_ops::tempnam ("", "oct-");
 
@@ -653,22 +683,7 @@
       std::ofstream file (name.c_str ());
 
       if (file)
-	{
-	  switch (ndim)
-	    {
-	    case 2:
-	      save_ascii_data_for_plotting (file, t, name);
-	      break;
-
-	    case 3:
-	      save_three_d (file, t, parametric);
-	      break;
-
-	    default:
-	      gripe_2_or_3_dim_plot ();
-	      break;
-	    }
-	}
+	write_data (file, val, ndim, parametric, name);
       else
 	{
 	  error ("couldn't open temporary output file `%s'", name.c_str ());
@@ -679,6 +694,46 @@
   return name;
 }
 
+DEFUN_DLD (__gnuplot_save_data__, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Loadable Function} {} __gnuplot_save_data__ (@var{data}, @var{ndim}, @var{parametric})\n\
+@end deftypefn")
+{
+  octave_value retval;
+
+  int nargin = args.length ();
+
+  if (nargin > 0 && nargin < 4)
+    {
+      int ndim = 2;
+      bool parametric = false;
+
+      if (nargin > 1)
+	{
+	  ndim = args(1).int_value ();
+
+	  if (! error_state)
+	    {
+	      if (nargin > 2)
+		parametric = args(2).bool_value ();
+	    }
+	}
+
+      if (! error_state)
+	{
+	  std::string file = save_in_tmp_file (args(0), ndim, parametric);
+
+	  mark_for_deletion (file);
+
+	  retval = file;
+	}
+    }
+  else
+    print_usage ();
+
+  return retval;
+}
+
 static int
 get_current_figure (void)
 {
@@ -735,6 +790,13 @@
       instance->do_send_raw (cmd);
   }
 
+  static void send_inline_data (const octave_value& val, int ndim,
+				bool parametric)
+  {
+    if (ensure_plot_stream ())
+      instance->do_send_inline_data (val, ndim, parametric);
+  }
+
   static void clear (void)
   {
     if (ensure_plot_stream ())
@@ -815,6 +877,9 @@
 
   void do_send_raw (const std::string& cmd);
 
+  void do_send_inline_data (const octave_value& val, int ndim,
+			    bool parametric);
+
   void do_clear (void);
 
   void do_set (const string_vector& argv);
@@ -1097,6 +1162,18 @@
 }
 
 void
+gnuplot::do_send_inline_data (const octave_value& val, int ndim,
+			      bool parametric)
+{
+  if (plot_stream && *plot_stream)
+    {
+      write_inline_data (*plot_stream, val, ndim, parametric);
+
+      plot_stream->flush ();
+    }
+}
+
+void
 gnuplot::do_clear (void)
 {
   do_send_raw ("clear\n");
@@ -1648,6 +1725,41 @@
   return octave_value_list ();
 }
 
+DEFUN_DLD (__gnuplot_send_inline_data__, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Loadable Function} {} __gnuplot_send_inline_data__ (@var{string})\n\
+Send @var{val} to gnuplot subprocess as inline data.\n\
+@end deftypefn")
+{
+  octave_value retval;
+
+  int nargin = args.length ();
+
+  if (nargin > 0 && nargin < 4)
+    {
+      int ndim = 2;
+      bool parametric = false;
+
+      if (nargin > 1)
+	{
+	  ndim = args(1).int_value ();
+
+	  if (! error_state)
+	    {
+	      if (nargin > 2)
+		parametric = args(2).bool_value ();
+	    }
+	}
+
+      if (! error_state)
+	gnuplot::send_inline_data (args(0), ndim, parametric);
+    }
+  else
+    print_usage ();
+
+  return retval;
+}
+
 DEFUN_DLD (__gnuplot_set__, args, ,
   "-*- texinfo -*-\n\
 @deffn {Loadable Function} __gnuplot_set__ options\n\

--- a/src/__gnuplot_raw__.l	Wed Nov 15 18:00:27 2006 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1820 +0,0 @@
-/*
-
-Copyright (C) 2004 John W. Eaton and Teemu Ikonen
-
-This file is part of Octave.
-
-Octave is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
-later version.
-
-Octave is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-for more details.
-
-You should have received a copy of the GNU General Public License
-along with Octavee; see the file COPYING.  If not, write to the Free
-Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA.
-
-*/
-
-%option prefix="gpt"
-%option noyywrap
-
-%{
-// PKG_ADD: mark_as_rawcommand ("__gnuplot_plot__");
-// PKG_ADD: mark_as_rawcommand ("__gnuplot_set__");
-// PKG_ADD: mark_as_rawcommand ("__gnuplot_splot__");
-// PKG_ADD: mark_as_rawcommand ("__gnuplot_replot__");
-
-// PKG_ADD: mark_as_command ("__gnuplot_show__");
-
-// PKG_ADD: atexit ("closeplot");
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <map>
-#include <string>
-#include <fstream>
-#include <iostream>
-#include <sstream>
-
-#ifdef HAVE_UNISTD_H
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#include <unistd.h>
-#endif
-
-#include "file-ops.h"
-#include "oct-env.h"
-
-#include "defun.h"
-#include "file-io.h"
-#include "gripes.h"
-#include "load-save.h"
-#include "parse.h"
-#include "procstream.h"
-#include "sighandlers.h"
-#include "utils.h"
-#include "variables.h"
-
-enum _toktype
-  {
-    START_PAREN = 1,
-    END_PAREN,
-    START_BRACE,
-    END_BRACE,
-    START_BRACKET,
-    END_BRACKET,
-    COLON,
-    SEMICOLON,
-    COMMA,
-    QUOTE,
-    IDENT,
-    NUMBER,
-    BINOP,
-    UNOP,
-    STRING,
-    OTHER,
-    TITLE,
-    USING,
-    WITH,
-    AXES,
-    CLEAR
-  };
-
-typedef bool (*pred) (const int);
-
-class
-gpt_parse_error
-{
-public:
-  gpt_parse_error (void) : msg () { }
-  gpt_parse_error (std::string errmsg) : msg (errmsg) { }
-
-  std::string msg;
-};
-
-static bool gpt_quote_is_transpose;
-static bool gpt_allow_plotkw;
-static int gpt_parens;
-static int gpt_brackets;
-static int gpt_braces;
-
-static bool can_be_plotkw (void);
-
-static int is_plot_keyword (const std::string& s);
-
-static int handle_string (char delim);
-static std::string strbuf;
-
-%}
-
-D	[0-9]
-S	[ \t]
-IDENT	([_a-zA-Z@][_a-zA-Z0-9]*)
-EXPON	([DdEe][+-]?{D}+)
-NUMBER  (({D}+\.?{D}*{EXPON}?)|(\.{D}+{EXPON}?)|(0[xX][0-9a-fA-F]+))
-NOT	((\~)|(\!))
-/* NOT is not strictly a binary operator, but is close enough for us. */
-BINOP   (({NOT})|(\.?([\*/\\^+-]|\*\*)=?)|([<=~!>&|]=)|([=&|<>]{1,2})|(<<=)|(>>=)|(\.))
-/* single quote (') transpose operator is handled separately. */
-UNOP    ((\+\+)|(\-\-)|(\.'))
-
-%%
-
-"(" {
-    gpt_quote_is_transpose = false;
-    gpt_parens++;
-    return START_PAREN;
-    }
-
-")" {
-    gpt_quote_is_transpose = true;
-    gpt_parens--;
-    return END_PAREN;
-    }
-
-"{" {
-    gpt_quote_is_transpose = false;
-    gpt_braces++;
-    return START_BRACE;
-    }
-
-"}" {
-    gpt_quote_is_transpose = true;
-    gpt_braces--;
-    return END_BRACE;
-    }
-
-"[" {
-    gpt_quote_is_transpose = false;
-    gpt_brackets++;
-    return START_BRACKET;
-    }
-
-"]" {
-    gpt_quote_is_transpose = true;
-    gpt_brackets--;
-    return END_BRACKET;
-    }
-
-":" {
-    gpt_quote_is_transpose = false;
-    return COLON;
-    }
-
-";" {
-    gpt_quote_is_transpose = false;
-    return SEMICOLON;
-    }
-
-"," {
-    gpt_quote_is_transpose = false;
-    return COMMA;
-    }
-
-"'" {
-    if (gpt_quote_is_transpose)
-      {
-        gpt_allow_plotkw = true;
-        return QUOTE;
-      }
-    else
-      {
-        gpt_quote_is_transpose = true;
-        gpt_allow_plotkw = true;
-        return handle_string ('\'');
-      }
-    }
-
-"\"" {
-    return handle_string ('"');
-    }
-
-{IDENT} {
-    int itok = 0;
-    if (can_be_plotkw () && (itok = is_plot_keyword (yytext)))
-      {
-        gpt_quote_is_transpose = false;
-        gpt_allow_plotkw = true;
-        return itok;
-      }
-    else if (std::string (yytext) == "function")
-      throw gpt_parse_error ("function keyword not allowed in plot commands");
-    else
-      {
-        gpt_quote_is_transpose = true;
-        gpt_allow_plotkw = true;
-        return IDENT;
-      }
-    }
-
-{D}+/\.[\*/\\^'] | /* ' */
-{NUMBER} {
-    gpt_quote_is_transpose = true;
-    gpt_allow_plotkw = true;
-    return NUMBER;
-    }
-
-{BINOP} {
-    gpt_quote_is_transpose = false;
-    gpt_allow_plotkw = false;
-    return BINOP;
-    }
-
-{UNOP} {
-    gpt_quote_is_transpose = false;
-    gpt_allow_plotkw = true;
-    return UNOP;
-    }
-
-{S} { /* Ignore spaces and tabs outside of character strings. */ }
-
-. {
-    gpt_quote_is_transpose = false;
-    gpt_allow_plotkw = true;
-    warning ("unknown token = \"%s\" in plot command", yytext);
-    return OTHER;
-    }
-
-%%
-
-// ------------------------------------------------------------
-// Interface to external gnuplot process(es), including gnuplot
-// command parser.
-// ------------------------------------------------------------
-
-// The name of the shell command to execute to start gnuplot.
-static std::string Vgnuplot_binary;
-
-// Append -title "Figure NN" to the gnuplot command?
-static bool Vgnuplot_use_title_option = octave_env::have_x11_display ();
-
-// Gnuplot command strings that we use.
-static std::string Vgnuplot_command_plot;
-static std::string Vgnuplot_command_replot;
-static std::string Vgnuplot_command_splot;
-static std::string Vgnuplot_command_using;
-static std::string Vgnuplot_command_with;
-static std::string Vgnuplot_command_axes;
-static std::string Vgnuplot_command_title;
-static std::string Vgnuplot_command_end;
-
-// If TRUE, a replot command is issued automatically each time a plot
-// changes in some way.
-static bool Vautomatic_replot;
-
-// Check if the parser state is such that a plot keyword can occur.
-
-static bool
-can_be_plotkw (void)
-{
-    return (gpt_allow_plotkw
-	    && (gpt_braces == 0)
-	    && (gpt_brackets == 0)
-	    && (gpt_parens == 0));
-}
-
-// Check to see if a character string matches any one of the plot
-// option keywords.  Don't match abbreviations for clear, since that's
-// not a gnuplot keyword (users will probably only expect to be able
-// to abbreviate actual gnuplot keywords).
-
-static int
-is_plot_keyword (const std::string& s)
-{
-  if (almost_match ("title", s, 1))
-    return TITLE;
-  else if (almost_match ("using", s, 1))
-    return USING;
-  else if (almost_match ("with", s, 1))
-    return WITH;
-  else if (almost_match ("axes", s, 2) || almost_match ("axis", s, 2))
-    return AXES;
-  else if ("clear" == s)
-    return CLEAR;
-  else
-    return 0;
-}
-
-// This is used to handle character strings.  Kludge alert.
-
-static int
-handle_string (char delim)
-{
-  int c;
-  bool escape_pending = false;
-
-  strbuf = std::string (1, delim);
-
-  while ((c = yyinput ()) != EOF)
-    {
-      if (c == '\\')
-	{
-	  if (escape_pending)
-	    {
-	      strbuf += static_cast<char> (c);
-	      escape_pending = false;
-	    }
-	  else
-	    {
-	      strbuf += static_cast<char> (c);
-	      escape_pending = true;
-	    }
-	  continue;
-	}
-      else if (c == '\n')
-	{
-	  error ("unterminated string constant");
-	  break;
-	}
-      else if (c == delim)
-	{
-	  if (escape_pending)
-	    strbuf += static_cast<char> (c);
-	  else
-	    {
-	      c = yyinput ();
-
-	      if (c == delim)
-		{
-		  strbuf += static_cast<char> (c);
-		  strbuf += static_cast<char> (c);
-		}
-	      else
-		{
-		  yyunput (c, yytext);
-		  strbuf += static_cast<char> (delim);
-		  return STRING;
-		}
-	    }
-	}
-      else
-	strbuf += static_cast<char> (c);
-
-      escape_pending = false;
-    }
-
-  throw gpt_parse_error ("unterminated string");
-
-  return 0;
-}
-
-// (Probably not necessesary, but current Matlab style plot functions
-// break without this (they emit too short gnuplot commands))
-
-static std::string
-plot_style_token (const std::string& s)
-{
-  std::string retval;
-
-  // FIXME -- specify minimum match length for these.
-  static const char *plot_styles[] =
-    {
-      "boxes",
-      "boxerrorbars",
-      "boxxyerrorbars",
-      "candlesticks",
-      "dots",
-      "errorbars",
-      "financebars",
-      "fsteps",
-      "histeps",
-      "impulses",
-      "lines",
-      "linespoints",
-      "points",
-      "steps",
-      "vector",
-      "xerrorbars",
-      "xyerrorbars",
-      "yerrorbars",
-      0,
-    };
-
-  const char * const *tmp = plot_styles;
-  while (*tmp)
-    {
-      if (almost_match (*tmp, s.c_str ()))
-	{
-	  retval = *tmp;
-	  break;
-	}
-
-      tmp++;
-    }
-
-  return retval;
-}
-
-// Some predicates on tokens
-
-// Return true for ":".
-
-static bool
-colonp (const int tok)
-{
-  return (tok == COLON);
-}
-
-// Return TRUE for "]".
-
-static bool
-endbracketp (const int tok)
-{
-  return (tok == END_BRACKET);
-}
-
-// Return TRUE for plot token, comma or end of input.
-
-static bool
-plottok_or_end_p (const int tok)
-{
-  return (tok == TITLE
-	  || tok == USING
-	  || tok == WITH
-	  || tok == AXES
-	  || tok == CLEAR
-	  || tok == COMMA
-	  || tok == 0);
-}
-
-// Equivalent to (colonp (tok) || plottok_or_end_p (tok)).
-
-static bool
-colon_plottok_or_end_p (const int tok)
-{
-  return (tok == COLON || plottok_or_end_p (tok));
-}
-
-// read until test is true and delimiters are balanced, or end of input.
-// Return the last token in lasttok
-
-static std::string
-read_until (pred test, int& lasttok) throw (gpt_parse_error)
-{
-  int tok;
-
-  // We have to maintain balanced delimiters per subexpression too.
-  int brackets = 0;
-  int parens = 0;
-  int braces = 0;
-  std::string s;
-
-  tok = gptlex ();
-
-  while (tok && ! (test (tok)
-		   && brackets == 0
-		   && parens == 0
-		   && braces == 0))
-    {
-      switch (tok)
-	{
-	case START_BRACKET:
-	  brackets++;
-	  break;
-
-	case END_BRACKET:
-	  brackets--;
-	  break;
-
-	case START_PAREN:
-	  parens++;
-	  break;
-
-	case END_PAREN:
-	  parens--;
-	  break;
-
-	case START_BRACE:
-	  braces++;
-	  break;
-
-	case END_BRACE:
-	  braces--;
-	  break;
-
-	default:
-	  break;
-        }
-
-      s += (tok == STRING ? strbuf : std::string (yytext)) + " ";
-
-      tok = gptlex ();
-    }
-
-  // Throw error only if we've reached the end token and the test
-  // doesn't accept it.
-
-  if (! test (tok) && ! tok)
-    throw gpt_parse_error ("unexpected end of input");
-
-  lasttok = tok;
-
-  return s;
-}
-
-// Eval the two expressions giving limits of range and print it.
-
-static std::string
-printrange (std::string starts, std::string ends)
-{
-  octave_value startv, endv;
-  int status;
-  std::string s;
-  std::ostringstream range_buf;
-
-  range_buf << "[";
-
-  if (! starts.empty ())
-    {
-      startv = eval_string (starts, true, status);
-      if (! startv.is_real_scalar ())
-	throw gpt_parse_error ();
-      startv.print_raw (range_buf);
-    }
-
-    range_buf << ":";
-
-    if (! ends.empty ())
-      {
-	endv = eval_string (ends, true, status);
-	if (! endv.is_real_scalar ())
-	  throw gpt_parse_error ();
-        endv.print_raw (range_buf);
-      }
-
-    range_buf << "]";
-
-    s = range_buf.str ();
-
-    return s;
-}
-
-// Handle plot parameters.
-
-// Parse, evaluate and print colon separated expressions in the using
-// plot parameter. The use of trailing format string is not supported.
-
-static std::string
-handle_using (int& lasttok)
-{
-  int tok;
-  std::string expr_str;
-  std::string retstr = Vgnuplot_command_using + " ";
-  bool out = false;
-
-  octave_value tmp_data;
-  int status;
-  while (! out)
-    {
-      expr_str = read_until (colon_plottok_or_end_p, tok);
-
-      tmp_data = eval_string (expr_str, true, status);
-      if (status != 0 || ! tmp_data.is_real_scalar ())
-	throw gpt_parse_error ();
-
-      std::ostringstream tmp_buf;
-      tmp_data.print_raw (tmp_buf);
-      retstr += tmp_buf.str ();
-
-      if (tok == COLON)
-	retstr += ":";
-      else
-	out = true;
-    }
-
-  lasttok = tok;
-
-  return retstr;
-}
-
-// Presently just passes the linewidth, pointtype etc. tokens as they are.
-
-static std::string
-handle_style (int& lasttok)
-{
-  std::string retstr = Vgnuplot_command_with + " ";
-  std::string style;
-
-  lasttok = gptlex ();
-
-  if (lasttok != IDENT)
-    throw gpt_parse_error ("expected plot style token");
-
-  style = std::string (yytext);
-  style = plot_style_token (style);
-
-  if (! style.empty ())
-    retstr += style;
-  else
-    retstr += std::string (yytext);
-
-  // FIXME -- should evaluate the remaining tokens, but this
-  // needs changes in the parser.
-  retstr += " " + read_until (plottok_or_end_p, lasttok);
-
-  return retstr;
-}
-
-// Axes has only one qualifier keyword, which is not evaluated.
-
-static std::string
-handle_axes (int& lasttok)
-{
-  return Vgnuplot_command_axes + " " + read_until (plottok_or_end_p, lasttok);
-}
-
-static std::string
-save_in_tmp_file (const octave_value& t, int ndim = 2, bool parametric = false)
-{
-  std::string name = file_ops::tempnam ("", "oct-");
-
-  if (! name.empty ())
-    {
-      std::ofstream file (name.c_str ());
-
-      if (file)
-	{
-	  switch (ndim)
-	    {
-	    case 2:
-	      save_ascii_data_for_plotting (file, t, name);
-	      break;
-
-	    case 3:
-	      save_three_d (file, t, parametric);
-	      break;
-
-	    default:
-	      gripe_2_or_3_dim_plot ();
-	      break;
-	    }
-	}
-      else
-	{
-	  error ("couldn't open temporary output file `%s'", name.c_str ());
-	  name.resize (0);
-	}
-    }
-
-  return name;
-}
-
-static int
-get_current_figure (void)
-{
-  int retval = 1;
-
-  octave_value cf = get_global_value ("__current_figure__", true);
-
-  if (cf.is_defined ())
-    retval = cf.int_value ();
-  else
-    set_global_value ("__current_figure__", retval);
-
-  return retval;
-}
-
-class
-gnuplot
-{
-protected:
-
-  gnuplot (void)
-    : plot_line_count (0), parametric_plot (false), 
-      use_title_option (Vgnuplot_use_title_option),
-      gnuplot_exe (Vgnuplot_binary),
-      gnuplot_terminal_type (), plot_stream ()
-  { do_init (); }
-
-public:
-
-  ~gnuplot (void) { }
-
-  static bool have_instance (void);
-
-  static bool ensure_instance (void);
-
-  static bool ensure_plot_stream (void);
-
-  static void open (void);
-
-  static void close (void);
-
-  static void close_all (void);
-
-  static bool plot_stream_event_handler (pid_t pid, int status);
-
-  static void send (const std::string& cmd)
-  {
-    if (ensure_plot_stream ())
-      instance->do_send (cmd);
-  }
-
-  static void send_raw (const std::string& cmd)
-  {
-    if (ensure_plot_stream ())
-      instance->do_send_raw (cmd);
-  }
-
-  static void clear (void)
-  {
-    if (ensure_plot_stream ())
-      instance->do_clear ();
-  }
-
-  static void set (const string_vector& argv)
-  {
-    if (ensure_plot_stream ())
-      instance->do_set (argv);
-  }
-
-  static void show (const string_vector& argv)
-  {
-    if (ensure_plot_stream ())
-      instance->do_show (argv);
-  }
-
-  static void set_gnuplot_exe (const std::string& exe)
-  {
-    if (ensure_instance ())
-      instance->do_set_gnuplot_exe (exe);
-  }
-
-  static void set_gnuplot_use_title_option (bool opt)
-  {
-    if (ensure_instance ())
-      instance->do_set_gnuplot_use_title_option (opt);
-  }
-
-  // FIXME -- should only remove tmp files associated with
-  // gnuplot?
-  static void cleanup_tmp_files (void) { ::cleanup_tmp_files (); }
-
-  static void plot (const string_vector& argv)
-  {
-    if (ensure_plot_stream ())
-      instance->do_plot (argv);
-  }
-
-private:
-
-  static gnuplot *instance;
-
-  static std::map<int, gnuplot *> instance_map;
-
-  // The number of lines we've plotted so far.
-  int plot_line_count;
-
-  // Is this a parametric plot?  Makes a difference for 3D plotting.
-  bool parametric_plot;
-
-  // Should we append '-title "TITLE"' to the gnuplot command?
-  bool use_title_option;
-
-  // The executable program to run.
-  std::string gnuplot_exe;
-
-  // The gnuplot terminal type.
-  std::string gnuplot_terminal_type;
-
-  // Pipe to gnuplot.
-  oprocstream *plot_stream;
-
-  pid_t pid (void) const;
-
-  static gnuplot *lookup_by_pid (pid_t pid);
-
-  void do_open (void);
-
-  void do_close (void);
-
-  void delete_plot_stream (void);
-
-  void reset_plot_stream (void);
-
-  void do_send (const std::string& cmd);
-
-  void do_send_raw (const std::string& cmd);
-
-  void do_clear (void);
-
-  void do_set (const string_vector& argv);
-
-  void do_show (const string_vector& argv);
-
-  void do_set_gnuplot_exe (const std::string& exe) { gnuplot_exe = exe; }
-
-  void do_set_gnuplot_use_title_option (bool opt) { use_title_option = opt; }
-
-  void do_plot (const string_vector& argv);
-
-  void do_init (void);
-
-  std::string
-  makeplot (std::string caller, std::string args) throw (gpt_parse_error);
-
-  std::string handle_title (int& lasttok);
-};
-
-gnuplot *gnuplot::instance = 0;
-
-std::map<int, gnuplot *> gnuplot::instance_map;
-
-bool
-gnuplot::have_instance (void)
-{
-  int current_figure = get_current_figure ();
-
-  if (instance_map.find (current_figure) != instance_map.end ())
-    {
-      instance = instance_map[current_figure];
-      return true;
-    }
-  else
-    return false;
-}
-
-bool
-gnuplot::ensure_instance (void)
-{
-  if (! have_instance ())
-    {
-      instance = new gnuplot ();
-
-      if (! instance)
-	{
-	  ::error ("unable to create gnuplot object!");
-
-	  return false;
-	}
-      else
-	instance_map[get_current_figure ()] = instance;
-    }
-
-  return true;
-}
-
-bool
-gnuplot::ensure_plot_stream (void)
-{
-  if (ensure_instance ())
-    {
-      instance->do_open ();
-
-      if (error_state)
-	return false;
-    }
-
-  return true;
-}
-
-void
-gnuplot::close (void)
-{
-  if (have_instance ())
-    {
-      instance->do_close ();
-
-      instance_map.erase (get_current_figure ());
-    }
-}
-
-void
-gnuplot::close_all (void)
-{
-  for (std::map<int, gnuplot *>::const_iterator p = instance_map.begin ();
-       p != instance_map.end ();
-       p++)
-    {
-      gnuplot *elt = p->second;
-
-      elt->do_close ();
-    }
-}
-
-pid_t
-gnuplot::pid (void) const
-{
-  return plot_stream ? plot_stream->pid () : -1;
-}
-
-gnuplot *
-gnuplot::lookup_by_pid (pid_t pid)
-{
-  gnuplot *retval = 0;
-
-  for (std::map<int, gnuplot *>::const_iterator p = instance_map.begin ();
-       p != instance_map.end ();
-       p++)
-    {
-      gnuplot *elt = p->second;
-
-      if (elt && elt->pid () == pid)
-	{
-	  retval = elt;
-	  break;
-	}
-    }
-
-  return retval;
-}
-
-void
-gnuplot::do_open (void)
-{
-  static bool initialized = false;
-
-  if (plot_stream && ! *plot_stream)
-    do_close ();
-
-  if (! plot_stream)
-    {
-      initialized = false;
-
-      plot_line_count = 0;
-
-      std::string cmd;
-
-      if (gnuplot_exe.empty ())
-	cmd = "gnuplot";
-      else
-        cmd = "\"" + gnuplot_exe + "\"";
-
-      // FIXME -- I'm not sure this is the right thing to do,
-      // but without it, C-c at the octave prompt will kill gnuplot...
-
-#if defined (HAVE_POSIX_SIGNALS)
-      sigset_t nset, oset;
-      sigemptyset (&nset);
-      sigaddset (&nset, SIGINT);
-      sigprocmask (SIG_BLOCK, &nset, &oset);
-#else
-      volatile octave_interrupt_handler old_interrupt_handler
-	= octave_ignore_interrupts ();
-#endif
-
-      if (use_title_option)
-	{
-	  std::ostringstream buf;
-
-	  buf << cmd << " -title \"Figure " << get_current_figure () << "\"";
-
-	  cmd = buf.str ();
-	}
-
-      plot_stream = new oprocstream (cmd.c_str ());
-
-      if (plot_stream && *plot_stream)
-	octave_child_list::insert (plot_stream->pid (),
-				   plot_stream_event_handler);
-      else
-	{
-	  delete_plot_stream ();
-
-	  error ("plot: unable to open pipe to `%s'", cmd.c_str ());
-	}
-
-#if defined (HAVE_POSIX_SIGNALS)
-      sigprocmask (SIG_SETMASK, &oset, 0);
-#else
-      octave_set_interrupt_handler (old_interrupt_handler);
-#endif
-    }
-
-  if (! error_state && plot_stream && *plot_stream && ! initialized)
-    {
-      initialized = true;
-
-      do_send_raw ("set style data lines\n");
-
-      if (! gnuplot_terminal_type.empty ())
-	do_send_raw ("set term " + gnuplot_terminal_type
-		     + Vgnuplot_command_end + "\n");
-    }
-}
-
-void
-gnuplot::delete_plot_stream (void)
-{
-  do_send_raw ("\nquit\n");
-
-  delete plot_stream;
-  plot_stream = 0;
-}
-
-void
-gnuplot::reset_plot_stream (void)
-{
-  delete_plot_stream ();
-
-  plot_line_count = 0;
-  parametric_plot = false;
-}
-
-void
-gnuplot::do_close (void)
-{
-  if (plot_stream)
-    {
-      octave_child_list::remove (plot_stream->pid ());
-
-      delete_plot_stream ();
-    }
-
-  plot_line_count = 0;
-}
-
-bool
-gnuplot::plot_stream_event_handler (pid_t pid, int status)
-{
-  bool retval = false;
-
-  if (pid > 0)
-    {
-      if (WIFEXITED (status) || WIFSIGNALLED (status))
-	{
-	  gnuplot *plotter = gnuplot::lookup_by_pid (pid);
-
-	  // We should only print a warning or request removal of the
-	  // process from the child list if the process died
-	  // unexpectedly.  If do_close is responsible for
-	  // gnuplot's death, then plotter will be 0 here and we don't
-	  // need to do anything.
-
-	  if (plotter)
-	    {
-	      plotter->reset_plot_stream ();
-
-	      warning ("connection to external plotter (pid = %d) lost --", pid);
-	      // Request removal of this PID from the list of child
-	      // processes.
-
-	      retval = true;
-	    }
-	}
-    }
-
-  return retval;
-}
-
-void
-gnuplot::do_send (const std::string& cmd)
-{
-  int replot_len = Vgnuplot_command_replot.length ();
-
-  bool is_replot = (Vgnuplot_command_replot == cmd.substr (0, replot_len));
-
-  if (! (plot_line_count == 0 && is_replot))
-    do_send_raw (cmd);
-}
-
-void
-gnuplot::do_send_raw (const std::string& cmd)
-{
-  if (plot_stream && *plot_stream)
-    {
-      *plot_stream << cmd;
-
-      plot_stream->flush ();
-    }
-}
-
-void
-gnuplot::do_clear (void)
-{
-  do_send_raw ("clear\n");
-
-  // FIXME -- instead of just clearing these things, it would
-  // be nice if we could reset things to a user-specified default
-  // state.
-
-  do_send_raw ("set title\n");
-  do_send_raw ("set xlabel\n");
-  do_send_raw ("set ylabel\n");
-  do_send_raw ("set nogrid\n");
-  do_send_raw ("set nolabel\n");
-
-  // This makes a simple `replot' not work after a `clearplot' command
-  // has been issued.
-
-  plot_line_count = 0;
-}
-
-void
-gnuplot::do_set (const string_vector& argv)
-{
-  int argc = argv.length ();
-
-  std::ostringstream plot_buf;
-
-  if (argc > 1)
-    {
-      if (almost_match ("parametric", argv[1], 3))
-	parametric_plot = true;
-      else if (almost_match ("noparametric", argv[1], 5))
-	parametric_plot = false;
-      else if (almost_match ("term", argv[1], 1))
-	{
-	  gnuplot_terminal_type = "";
-	  std::ostringstream buf;
-	  int i;
-	  for (i = 2; i < argc-1; i++)
-	    buf << argv[i] << " ";
-	  if (i < argc)
-	    buf << argv[i];
-	  buf << Vgnuplot_command_end;
-	  gnuplot_terminal_type = buf.str ();
-	}
-    }
-
-  int i;
-  for (i = 0; i < argc-1; i++)
-    plot_buf << argv[i] << " ";
-
-  if (i < argc)
-    plot_buf << argv[i];
-
-  plot_buf << Vgnuplot_command_end;
-
-  do_send_raw (plot_buf.str ());
-}
-
-void
-gnuplot::do_show (const string_vector& argv)
-{
-  int argc = argv.length ();
-
-  std::ostringstream plot_buf;
-
-  int i;
-  for (i = 0; i < argc-1; i++)
-    plot_buf << argv[i] << " ";
-  if (i < argc)
-    plot_buf << argv[i];
-
-  plot_buf << Vgnuplot_command_end;
-
-  do_send (plot_buf.str ());
-}
-
-void
-gnuplot::do_plot (const string_vector& argv)
-{
-  std::string s;
-
-  for (int i = 1; i < argv.length (); i++)
-    s += argv[i] + " ";
-
-  try
-    {
-      std::string cmd = makeplot (argv[0], s);
-
-      do_send (cmd);
-    }
-  catch (gpt_parse_error& e)
-    {
-      if (e.msg.empty ())
-	error ("could not parse plot command");
-      else
-	error (e.msg.c_str ());
-    }
-}
-
-// Parse and evaluate parameter string and pass it to gnuplot pipe.
-
-std::string
-gnuplot::makeplot (std::string caller, std::string args)
-  throw (gpt_parse_error)
-{
-  std::string retval;
-
-  YY_BUFFER_STATE bstate;
-
-  bstate = yy_scan_string (args.c_str ());
-  yy_switch_to_buffer (bstate);
-  std::string outstr;
-  int ndim = 2;
-
-  if (caller == "replot")
-    {
-      ndim = 1;
-      outstr += Vgnuplot_command_replot + " ";
-    }
-  else if (caller == "plot")
-    {
-      ndim = 2;
-      plot_line_count = 0;
-      outstr += Vgnuplot_command_plot + " ";
-    }
-  else if (caller == "splot")
-    {
-      ndim = 3;
-      plot_line_count = 0;
-      outstr += Vgnuplot_command_splot + " ";
-    }
-  else
-    throw gpt_parse_error ("unknown plot command");
-
-  gpt_quote_is_transpose = false;
-  gpt_allow_plotkw = false;
-  gpt_parens = 0;
-  gpt_braces = 0;
-  gpt_brackets = 0;
-
-  int tok;
-  tok = gptlex ();
-  if (plottok_or_end_p (tok) && caller != "replot")
-    throw gpt_parse_error ("must have something to plot");
-
-  while (tok)
-    {
-      bool title_set = false;
-      bool using_set = false;
-      bool style_set = false;
-      bool axes_set = false;
-
-      if (tok == START_BRACKET)
-	{
-	  if (caller == "replot")
-	    throw gpt_parse_error ("can't specify new plot ranges with `replot' or while hold is on");
-
-	  std::string xrange_start_str = read_until (colonp, tok);
-	  std::string xrange_end_str = read_until (endbracketp, tok);
-	  outstr += printrange (xrange_start_str, xrange_end_str) + " ";
-	  tok = gptlex ();
-	  if (tok == START_BRACKET)
-	    {
-	      std::string yrange_start_str = read_until (colonp, tok);
-	      std::string yrange_end_str = read_until (endbracketp, tok);
-	      outstr += printrange (yrange_start_str, yrange_end_str) + " ";
-	      tok = gptlex ();
-	      if (tok == START_BRACKET && caller == "gsplot")
-		{
-		  std::string zrange_start_str = read_until (colonp, tok);
-		  std::string zrange_end_str = read_until (endbracketp, tok);
-		  outstr += printrange (zrange_start_str, zrange_end_str) + " ";
-		  tok = gptlex ();
-                }
-            }
-        }
-
-      if (plottok_or_end_p (tok))
-	return std::string ();
-      else
-	{
-	  std::string file;
-	  plot_line_count++;
-
-	  std::string plot_expr_str;
-	  plot_expr_str += std::string (yytext) + " ";
-	  plot_expr_str += read_until (plottok_or_end_p, tok);
-
-	  int status = 0;
-	  octave_value tmp_data = eval_string (plot_expr_str,
-					       true, status);
-
-	  if (status != 0 || ! tmp_data.is_defined ())
-	    throw gpt_parse_error ();
-
-	  std::ostringstream tmp_buf;
-	  tmp_data.print_raw (tmp_buf);
-
-	  if (tmp_data.is_string ())
-	    {
-	      file = file_ops::tilde_expand (tmp_data.string_value ());
-	      // FIXME -- perhaps should check if the file exists?
-	      outstr += file + " ";
-	    }
-	  else
-	    {
-	      switch (ndim)
-		{
-		case 2:
-		  file = save_in_tmp_file (tmp_data, ndim);
-		  break;
-
-		case 3:
-		  file = save_in_tmp_file (tmp_data, ndim,
-					   parametric_plot);
-		  break;
-
-		default:
-		  gripe_2_or_3_dim_plot ();
-		  break;
-		}
-
-	      if (file.length () > 0)
-		{
-		  mark_for_deletion (file);
-		  outstr += "'" + file + "' ";
-		}
-	    }
-        }
-
-      std::string title_str;
-      std::string using_str;
-      std::string style_str;
-      std::string axes_str;
-
-      bool out = false;
-      while (tok && ! out)
-	{
-	  switch (tok)
-	    {
-	    case COMMA:
-	      out = true;
-	      break;
-
-	    case TITLE:
-	      if (! title_set)
-		title_str += handle_title (tok) + " ";
-	      else
-		throw gpt_parse_error ("only one title option may be specified");
-	      title_set = true;
-	      break;
-
-	    case USING:
-	      if (! using_set)
-		using_str += handle_using (tok) + " ";
-	      else
-		throw gpt_parse_error ("only one using option may be specified");
-	      using_set = true;
-	      break;
-
-	    case WITH:
-	      if (! style_set)
-		style_str += handle_style (tok) + " ";
-	      else
-		throw gpt_parse_error ("only one style option may be specified");
-	      style_set = true;
-	      break;
-
-	    case AXES:
-	      if (! axes_set)
-		axes_str += handle_axes (tok) + " ";
-	      else
-		throw gpt_parse_error ("only one axes option may be specified");
-	      axes_set = true;
-	      break;
-
-	    default:
-	      tok = 0;
-	      break;
-            }
-        }
-
-        if (! title_set)
-	  {
-            std::ostringstream tmp_buf;
-            tmp_buf << Vgnuplot_command_title << " \"line "
-                    << plot_line_count << "\" ";
-            title_str = tmp_buf.str ();
-	    title_set = true;
-        }
-
-	// Plot parameters have to be output in this order.
-	if (using_set)
-	  outstr += using_str;
-
-	if (axes_set)
-	  outstr += axes_str;
-
-	if (title_set)
-	  outstr += title_str;
-
-	if (style_set)
-	  outstr += style_str;
-
-	if (out)
-	  {
-	    // Saw comma on while loop.
-            outstr += ", ";
-            gpt_quote_is_transpose = false;
-            gpt_allow_plotkw = false;
-            gpt_parens = 0;
-            gpt_braces = 0;
-            gpt_brackets = 0;
-            tok = gptlex ();
-	  }
-    }
-
-  outstr += Vgnuplot_command_end;
-
-  return outstr;
-}
-
-// Title has one string expression which is evaluated and printed to the
-// gnuplot command string.
-
-std::string
-gnuplot::handle_title (int& lasttok)
-{
-  int tok;
-  std::string retstr = Vgnuplot_command_title + " ";
-  std::string title_expr_str;
-
-  title_expr_str += read_until (plottok_or_end_p, tok);
-
-  int status;
-  octave_value tmp_data = eval_string (title_expr_str, true, status);
-
-  if (status != 0 || ! tmp_data.is_defined ())
-    throw gpt_parse_error ();
-
-  std::ostringstream tmp_buf;
-  if (tmp_data.is_string ())
-    {
-      tmp_buf << '"';
-      tmp_data.print_raw (tmp_buf);
-      tmp_buf << '"';
-    }
-  else
-    {
-      warning ("line title must be a string");
-      tmp_buf << '"' << "line " << plot_line_count << '"';
-    }
-
-  retstr += tmp_buf.str ();
-
-  lasttok = tok;
-
-  return retstr;
-}
-
-// The static instance of this class is here so that
-// gnuplot::close_all will be called when the .oct file is unloaded.
-
-class
-gnuplot_X
-{
-public:
-  gnuplot_X (void) { }
-  ~gnuplot_X (void) { gnuplot::close_all (); }
-};
-
-static gnuplot_X X;
-
-static int
-automatic_replot (void)
-{
-  Vautomatic_replot = check_preference ("automatic_replot");
-
-  return 0;
-}
-
-static int
-set_string_var (std::string& var, const char *nm)
-{
-  int retval = 0;
-
-  std::string s = builtin_string_variable (nm);
-
-  if (s.empty ())
-    {
-      gripe_invalid_value_specified (nm);
-      retval = -1;
-    }
-  else
-    var = s;
-
-  return retval;
-}
-
-static int
-gnuplot_binary (void)
-{
-  int status = set_string_var (Vgnuplot_binary, "gnuplot_binary");
-
-  if (status == 0)
-    gnuplot::set_gnuplot_exe (Vgnuplot_binary);
-
-  return status;
-}
-
-static int
-gnuplot_command_plot (void)
-{
-  return set_string_var (Vgnuplot_command_plot, "gnuplot_command_plot");
-}
-
-static int
-gnuplot_command_replot (void)
-{
-  return set_string_var (Vgnuplot_command_replot, "gnuplot_command_replot");
-}
-
-static int
-gnuplot_command_splot (void)
-{
-  return set_string_var (Vgnuplot_command_splot, "gnuplot_command_splot");
-}
-
-static int
-gnuplot_command_using (void)
-{
-  return set_string_var (Vgnuplot_command_using, "gnuplot_command_using");
-}
-
-static int
-gnuplot_command_with (void)
-{
-  return set_string_var (Vgnuplot_command_with, "gnuplot_command_with");
-}
-
-static int
-gnuplot_command_axes (void)
-{
-  return set_string_var (Vgnuplot_command_axes, "gnuplot_command_axes");
-}
-
-static int
-gnuplot_command_title (void)
-{
-  return set_string_var (Vgnuplot_command_title, "gnuplot_command_title");
-}
-
-static int
-gnuplot_command_end (void)
-{
-  return set_string_var (Vgnuplot_command_end, "gnuplot_command_end");
-}
-
-static int
-gnuplot_use_title_option (void)
-{
-  Vgnuplot_use_title_option = check_preference ("gnuplot_use_title_option");
-
-  gnuplot::set_gnuplot_use_title_option (Vgnuplot_use_title_option);
-
-  return 0;
-}
-
-void
-gnuplot::do_init (void)
-{
-  // Do nothing.
-}
-
-void
-symbols_of___gnuplot_raw__ (void)
-{
-  static bool gnuplot_initialized = false;
-
-  if (gnuplot_initialized)
-    return;
-
-  gnuplot_initialized = true;
-
-  // This is temporary.
-  mark_as_rawcommand ("__gnuplot_plot__");
-  mark_as_rawcommand ("__gnuplot_set__");
-  mark_as_rawcommand ("__gnuplot_splot__");
-  mark_as_rawcommand ("__gnuplot_replot__");
-
-  if (is_builtin_variable ("automatic_replot"))
-    automatic_replot ();
-  else
-    DEFVAR (automatic_replot, true, automatic_replot,
-    "-*- texinfo -*-\n\
-@defvr {Built-in Variable} automatic_replot\n\
-You can tell Octave to redisplay the plot each time anything about it\n\
-changes by setting the value of the builtin variable\n\
-@code{automatic_replot} to a nonzero value.  Although it is fairly\n\
-inefficient, especially for large plots, the default value is 1 for\n\
-compatibility with Matlab.\n\
-@end defvr");
-
-  if (is_builtin_variable ("gnuplot_binary"))
-    gnuplot_binary ();
-  else
-    DEFVAR (gnuplot_binary, GNUPLOT_BINARY, gnuplot_binary,
-    "-*- texinfo -*-\n\
-@defvr {Built-in Variable} gnuplot_binary\n\
-The name of the program invoked by the plot command.  The default value\n\
-is @code{\"gnuplot\"}.  @xref{Installation}.\n\
-@end defvr");
-
-  if (is_builtin_variable ("gnuplot_command_plot"))
-    gnuplot_command_plot ();
-  else
-    DEFVAR (gnuplot_command_plot, "pl", gnuplot_command_plot,
-    "-*- texinfo -*-\n\
-@defvr {Built-in Variable} gnuplot_command_plot\n\
-@end defvr");
-
-  if (is_builtin_variable ("gnuplot_command_replot"))
-    gnuplot_command_replot ();
-  else
-    DEFVAR (gnuplot_command_replot, "rep", gnuplot_command_replot,
-    "-*- texinfo -*-\n\
-@defvr {Built-in Variable} gnuplot_command_replot\n\
-@end defvr");
-
-  if (is_builtin_variable ("gnuplot_command_splot"))
-    gnuplot_command_splot ();
-  else
-    DEFVAR (gnuplot_command_splot, "sp", gnuplot_command_splot,
-    "-*- texinfo -*-\n\
-@defvr {Built-in Variable} gnuplot_command_splot\n\
-@end defvr");
-
-  if (is_builtin_variable ("gnuplot_command_using"))
-    gnuplot_command_using ();
-  else
-    DEFVAR (gnuplot_command_using, "u", gnuplot_command_using,
-    "-*- texinfo -*-\n\
-@defvr {Built-in Variable} gnuplot_command_using\n\
-@end defvr");
-
-  if (is_builtin_variable ("gnuplot_command_with"))
-    gnuplot_command_with ();
-  else
-    DEFVAR (gnuplot_command_with, "w", gnuplot_command_with,
-    "-*- texinfo -*-\n\
-@defvr {Built-in Variable} gnuplot_command_with\n\
-@end defvr");
-
-  if (is_builtin_variable ("gnuplot_command_axes"))
-    gnuplot_command_axes ();
-  else
-    DEFVAR (gnuplot_command_axes, "ax", gnuplot_command_axes,
-    "-*- texinfo -*-\n\
-@defvr {Built-in Variable} gnuplot_command_axes\n\
-@end defvr");
-
-  if (is_builtin_variable ("gnuplot_command_title"))
-    gnuplot_command_title ();
-  else
-    DEFVAR (gnuplot_command_title, "t", gnuplot_command_title,
-    "-*- texinfo -*-\n\
-@defvr {Built-in Variable} gnuplot_command_title\n\
-@end defvr");
-
-  if (is_builtin_variable ("gnuplot_command_end"))
-    gnuplot_command_end ();
-  else
-    DEFVAR (gnuplot_command_end, "\n", gnuplot_command_end,
-    "-*- texinfo -*-\n\
-@defvr {Built-in Variable} gnuplot_command_end\n\
-@end defvr");
-
-  if (is_builtin_variable ("gnuplot_use_title_option"))
-    gnuplot_use_title_option ();
-  else
-    DEFVAR (gnuplot_use_title_option, octave_env::have_x11_display (),
-	    gnuplot_use_title_option,
-    "-*- texinfo -*-\n\
-@defvr {Built-in Variable} gnuplot_use_title_option\n\
-If nonzero, append @samp{-title \"Figure NN\"} to the gnuplot command.\n\
-@end defvr");
-
-}
-
-// -----------------------
-// User-callable functions
-// -----------------------
-
-DEFUN (clearplot, , ,
-  "-*- texinfo -*-\n\
-@deftypefn {Built-in Function} {} clearplot\n\
-@deftypefnx {Built-in Function} {} clg\n\
-Clear the plot window and any titles or axis labels.  The name\n\
-@code{clg} is aliased to @code{clearplot} for compatibility with\n\
-@sc{Matlab}.\n\
-@end deftypefn")
-{
-  gnuplot::clear ();
-
-  octave_value_list args;
-
-  args(0) = "off";
-
-  feval ("hold", args);
-
-  return octave_value_list ();
-}
-
-DEFUN (closeplot, , ,
-  "-*- texinfo -*-\n\
-@deftypefn {Built-in Function} {} closeplot\n\
-Close stream to the @code{gnuplot} subprocess.  If you are using X11,\n\
-this will close the plot window.\n\
-@end deftypefn")
-{
-  gnuplot::close ();
-
-  return octave_value_list ();
-}
-
-DEFUN (purge_tmp_files, , ,
-  "-*- texinfo -*-\n\
-@deftypefn {Built-in Function} {} purge_tmp_files\n\
-Delete the temporary files created by the plotting commands.\n\
-\n\
-Octave creates temporary data files for @code{gnuplot} and then sends\n\
-commands to @code{gnuplot} through a pipe.  Octave will delete the\n\
-temporary files on exit, but if you are doing a lot of plotting you may\n\
-want to clean up in the middle of a session.\n\
-\n\
-A future version of Octave will eliminate the need to use temporary\n\
-files to hold the plot data.\n\
-@end deftypefn")
-{
-  gnuplot::cleanup_tmp_files ();
-
-  return octave_value_list ();
-}
-
-DEFUN (__gnuplot_raw__, args, ,
-  "-*- texinfo -*-\n\
-@deftypefn {Built-in Function} {} __gnuplot_raw__ (@var{string})\n\
-Send @var{string} directly to gnuplot subprocess.\n\
-@end deftypefn")
-{
-  if (args.length () == 1 && args(0).is_string ())
-    {
-      std::string cmd = args(0).string_value ();
-
-      gnuplot::send_raw (cmd);
-    }
-  else
-    print_usage ();
-
-  return octave_value_list ();
-}
-
-DEFUN (__gnuplot_set__, args, ,
-  "-*- texinfo -*-\n\
-@deffn {Command} __gnuplot_set__ options\n\
-Set plotting options for gnuplot\n\
-@end deffn")
-{
-  string_vector argv = args.make_argv ("set");
-
-  if (! error_state)
-    gnuplot::set (argv);
-
-  return octave_value_list ();
-}
-
-DEFCMD (__gnuplot_show__, args, ,
-  "-*- texinfo -*-\n\
-@deffn {Command} __gnuplot_show__ options\n\
-Show plotting options.\n\
-@end deffn")
-{
-  string_vector argv = args.make_argv ("show");
-
-  if (! error_state)
-    gnuplot::show (argv);
-
-  return octave_value_list ();
-}
-
-DEFUN (__gnuplot_plot__, args, ,
-  "Plot with gnuplot.\n")
-{
-  string_vector argv = args.make_argv ("plot");
-
-  if (! error_state)
-    gnuplot::plot (argv);
-
-  return octave_value_list ();
-}
-
-DEFUN (__gnuplot_splot__, args, ,
-  "Plot with gnuplot.\n")
-{
-  string_vector argv = args.make_argv ("splot");
-
-  if (! error_state)
-    gnuplot::plot (argv);
-
-  return octave_value_list ();
-}
-
-DEFUN (__gnuplot_replot__, args, ,
-  "Plot with gnuplot.\n")
-{
-  string_vector argv = args.make_argv ("replot");
-
-  if (! error_state)
-    gnuplot::plot (argv);
-
-  return octave_value_list ();
-}
-
-/*
-;;; Local Variables: ***
-;;; mode: C++ ***
-;;; End: ***
-*/

--- a/src/ls-oct-ascii.cc	Wed Nov 15 18:00:27 2006 +0000
+++ b/src/ls-oct-ascii.cc	Wed Nov 15 20:03:18 2006 +0000
@@ -350,7 +350,7 @@
 {
   bool infnan_warned = true;
 
-  return save_ascii_data (os, t, name, infnan_warned, false, 0);
+  return save_ascii_data (os, t, name, infnan_warned, false, 4);
 }
 
 // Maybe this should be a static function in tree-plot.cc?
@@ -374,6 +374,9 @@
 	 << "# total rows: " << nr << "\n"
 	 << "# total columns: " << nc << "\n";
 
+      long old_precision = os.precision ();
+      os.precision (4);
+
       if (parametric)
 	{
 	  octave_idx_type extras = nc % 3;
@@ -402,6 +405,8 @@
 		os << "\n";
 	    }
 	}
+
+      os.precision (old_precision);
     }
   else
     {