# HG changeset patch
# User jwe
# Date 1054748595 0
# Node ID 92be67bc9301a08550f94bf497d9641a8874bb1b
# Parent  747e1e895f7c587b63562e38666c8816f3051af3
[project @ 2003-06-04 17:43:15 by jwe]

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2003-06-04  John W. Eaton  <jwe@bevo.che.wisc.edu>
+
+	* emacs/octave-mod.el (octave-variables): Eliminate
+	gnuplot_has_multiplot.
+
 2003-05-21  John W. Eaton  <jwe@bevo.che.wisc.edu>
 
 	* configure.in: In check for f_open in libf2c, only use
diff --git a/doc/interpreter/plot.txi b/doc/interpreter/plot.txi
--- a/doc/interpreter/plot.txi
+++ b/doc/interpreter/plot.txi
@@ -349,8 +349,6 @@
 
 @DOCSTRING(gnuplot_has_frames)
 
-@DOCSTRING(gnuplot_has_multiplot)
-
 @DOCSTRING(graw)
 
 @DOCSTRING(gnuplot_command_plot)
diff --git a/emacs/octave-mod.el b/emacs/octave-mod.el
--- a/emacs/octave-mod.el
+++ b/emacs/octave-mod.el
@@ -142,7 +142,7 @@
     "default_return_value" "default_save_format"
     "define_all_return_values" "do_fortran_indexing" "e"
     "echo_executing_commands" "empty_list_elements_ok" "eps"
-    "error_text" "gnuplot_binary" "gnuplot_has_multiplot" "history_file"
+    "error_text" "gnuplot_binary" "history_file"
     "history_size" "ignore_function_time_stamp" "implicit_str_to_num_ok"
     "inf" "nan" "nargin" "ok_to_lose_imaginary_part"
     "output_max_field_width" "output_precision"
diff --git a/scripts/ChangeLog b/scripts/ChangeLog
--- a/scripts/ChangeLog
+++ b/scripts/ChangeLog
@@ -1,3 +1,12 @@
+2003-06-04  John W. Eaton  <jwe@bevo.che.wisc.edu>
+
+	* control/base/__stepimp__.m, control/base/nichols.m,
+	control/base/nyquist.m, miscellaneous/dump_prefs.m,
+	plot/bottom_title.m, plot/mplot.m, plot/multiplot.m,
+	plot/oneplot.m, plot/plot_border.m, plot/subplot.m,
+	plot/subwindow.m, plot/top_title.m, signal/freqz_plot.m:
+	Eliminate gnuplot_has_multiplot (assume it is always true).
+
 2003-05-14  John W. Eaton  <jwe@bevo.che.wisc.edu>
 
 	* Makefile.in, image/Makefile.in, startup/Makefile.in: Handle DESTDIR.
diff --git a/scripts/control/base/__stepimp__.m b/scripts/control/base/__stepimp__.m
--- a/scripts/control/base/__stepimp__.m
+++ b/scripts/control/base/__stepimp__.m
@@ -224,60 +224,46 @@
       gset autoscale
       gset nokey
       clearplot();
-      if (gnuplot_has_multiplot)
-	if (IMPULSE)
-          gm = zeros(NOUT, 1);
-          tt = "impulse";
+      if (IMPULSE)
+	gm = zeros(NOUT, 1);
+	tt = "impulse";
+      else
+	ssys = ss2sys(F, G, C, D, t_step);
+	gm = dcgain(ssys);
+	tt = "step";
+      endif
+      ncols = floor(sqrt(NOUT));
+      nrows = ceil(NOUT / ncols);
+      for i = 1:NOUT
+	subplot(nrows, ncols, i);
+	title(sprintf("%s: | %s -> %s", tt,sysgetsignals(sys,"in",inp,1), ...
+		      sysgetsignals(sys,"out",i,1)));
+	if (DIGITAL)
+	  [ts, ys] = stairs(t, y(i,:));
+	  ts = ts(1:2*n-2)';  ys = ys(1:2*n-2)';
+	  if (length(gm) > 0)
+	    yy = [ys; gm(i)*ones(size(ts))];
+	  else
+	    yy = ys;
+	  endif
+	  grid("on");
+	  xlabel("time [s]");
+	  ylabel("y(t)");
+	  plot(ts, yy);
 	else
-          ssys = ss2sys(F, G, C, D, t_step);
-          gm = dcgain(ssys);
-          tt = "step";
+	  if (length(gm) > 0)
+	    yy = [y(i,:); gm(i)*ones(size(t))];
+	  else
+	    yy = y(i,:);
+	  endif
+	  grid("on");
+	  xlabel("time [s]");
+	  ylabel("y(t)");
+	  plot(t, yy);
 	endif
-	ncols = floor(sqrt(NOUT));
-	nrows = ceil(NOUT / ncols);
-	for i = 1:NOUT
-          subplot(nrows, ncols, i);
-          title(sprintf("%s: | %s -> %s", tt,sysgetsignals(sys,"in",inp,1), ...
-			sysgetsignals(sys,"out",i,1)));
-          if (DIGITAL)
-            [ts, ys] = stairs(t, y(i,:));
-            ts = ts(1:2*n-2)';  ys = ys(1:2*n-2)';
-            if (length(gm) > 0)
-              yy = [ys; gm(i)*ones(size(ts))];
-            else
-              yy = ys;
-            endif
-            grid("on");
-            xlabel("time [s]");
-            ylabel("y(t)");
-            plot(ts, yy);
-          else
-            if (length(gm) > 0)
-              yy = [y(i,:); gm(i)*ones(size(t))];
-            else
-              yy = y(i,:);
-            endif
-            grid("on");
-            xlabel("time [s]");
-            ylabel("y(t)");
-            plot(t, yy);
-          endif
-	endfor
-	## leave gnuplot in multiplot mode is bad style
-	oneplot();
-      else
-	## plot everything in one diagram
-	title([tt, " response | ", sysgetsignals(sys,"in",inp,1), ...
-               " -> all outputs"]);
-	if (DIGITAL)
-          stairs(t, y(i,:));
-	else
-          grid("on");
-          xlabel("time [s]");
-          ylabel("y(t)");
-          plot(t, y(i,:));
-	endif
-      endif
+      endfor
+      ## leave gnuplot in multiplot mode is bad style
+      oneplot();
       y=[];
       t=[];
     endif
diff --git a/scripts/control/base/bode.m b/scripts/control/base/bode.m
--- a/scripts/control/base/bode.m
+++ b/scripts/control/base/bode.m
@@ -148,13 +148,9 @@
     save_automatic_replot = automatic_replot;
     unwind_protect
       automatic_replot = 0;
-      if(gnuplot_has_multiplot)
-	oneplot();
-      endif
+      oneplot();
       gset autoscale;
-      if(gnuplot_has_multiplot)
-	gset nokey;
-      endif
+      gset nokey;
       clearplot();
       gset data style lines;
       if(is_digital(sys))
@@ -166,9 +162,7 @@
       endif
       xlabel(xlstr);
       if(is_siso(sys))
-	if (gnuplot_has_multiplot)
-	  subplot(2,1,1);
-	endif
+	subplot(2,1,1);
 	title(["|[Y/U]",tistr,"|, u=", nth(inname,1),", y=",nth(outname,1)]);
       else
 	title([ "||Y(", tistr, ")/U(", tistr, ")||"]);
@@ -196,11 +190,7 @@
 	loglog(w,md);
       endif
       if (is_siso(sys))
-	if (gnuplot_has_multiplot)
-	  subplot(2,1,2);
-	else
-	  prompt("Press any key for phase plot");
-	endif
+	subplot(2,1,2);
 	axvec = axis2dlim([vec(w),vec(phase)]);
 	axvec(1:2) = wv;
 	axis(axvec);
@@ -211,9 +201,7 @@
 	grid("on");
 	semilogx(w,phase);
 	## This should be the default for subsequent plot commands.
-	if(gnuplot_has_multiplot)
-	  oneplot();
-	endif
+	oneplot();
       endif
     unwind_protect_cleanup
       automatic_replot = save_automatic_replot;
diff --git a/scripts/control/base/nichols.m b/scripts/control/base/nichols.m
--- a/scripts/control/base/nichols.m
+++ b/scripts/control/base/nichols.m
@@ -78,13 +78,9 @@
 
   if (nargout < 1),
     ## Plot the information
-    if(gnuplot_has_multiplot)
-      oneplot();
-    endif
+    oneplot();
     gset autoscale;
-    if(gnuplot_has_multiplot)
-      gset nokey;
-    endif
+    gset nokey;
     clearplot();
     grid("on");
     gset data style lines;
diff --git a/scripts/control/base/nyquist.m b/scripts/control/base/nyquist.m
--- a/scripts/control/base/nyquist.m
+++ b/scripts/control/base/nyquist.m
@@ -129,10 +129,8 @@
   if (nargout == 0)
     dnplot = 0;
     while(!dnplot)
-      if(gnuplot_has_multiplot)
-        oneplot();
-        gset key;
-      endif
+      oneplot();
+      gset key;
       clearplot();
       grid ("on");
       gset data style lines;
diff --git a/scripts/miscellaneous/dump_prefs.m b/scripts/miscellaneous/dump_prefs.m
--- a/scripts/miscellaneous/dump_prefs.m
+++ b/scripts/miscellaneous/dump_prefs.m
@@ -68,7 +68,6 @@
               "gnuplot_command_using";
               "gnuplot_command_with";
               "gnuplot_has_frames";
-              "gnuplot_has_multiplot";
               "history_file";
               "history_size";
               "ignore_function_time_stamp";
diff --git a/scripts/plot/bottom_title.m b/scripts/plot/bottom_title.m
--- a/scripts/plot/bottom_title.m
+++ b/scripts/plot/bottom_title.m
@@ -27,10 +27,6 @@
 
 function bottom_title (text)
 
-  if (! gnuplot_has_multiplot)
-    error ("bottom_title: gnuplot does not appear to support this feature");
-  endif
-
   if (nargin != 1)
     usage ("bottom_title (text)");
   endif
diff --git a/scripts/plot/mplot.m b/scripts/plot/mplot.m
--- a/scripts/plot/mplot.m
+++ b/scripts/plot/mplot.m
@@ -34,10 +34,6 @@
 
 function mplot (varargin)
 
-  if (! gnuplot_has_multiplot)
-    error ("mplot: gnuplot does not appear to support this feature");
-  endif
-
   ## global variables to keep track of multiplot options
 
   global __multiplot_mode__ = 0;
diff --git a/scripts/plot/multiplot.m b/scripts/plot/multiplot.m
--- a/scripts/plot/multiplot.m
+++ b/scripts/plot/multiplot.m
@@ -33,10 +33,6 @@
 
 function multiplot (xn, yn)
 
-  if (! gnuplot_has_multiplot)
-    error ("multiplot: gnuplot does not appear to support this feature");
-  endif
-
   ## global variables to keep track of multiplot options
 
   global __multiplot_mode__ = 0;
diff --git a/scripts/plot/oneplot.m b/scripts/plot/oneplot.m
--- a/scripts/plot/oneplot.m
+++ b/scripts/plot/oneplot.m
@@ -28,18 +28,14 @@
 
 function oneplot ()
 
-  if (gnuplot_has_multiplot)
-
-    global __multiplot_mode__ = 0;
+  global __multiplot_mode__ = 0;
 
-    if (__multiplot_mode__)
-      gset nomultiplot;
-      gset size 1, 1;
-      gset origin 0, 0;
-      __multiplot_mode__ = 0;
-      gnuplot_command_replot = "rep";
-    endif
-
+  if (__multiplot_mode__)
+    gset nomultiplot;
+    gset size 1, 1;
+    gset origin 0, 0;
+    __multiplot_mode__ = 0;
+    gnuplot_command_replot = "rep";
   endif
 
 endfunction
diff --git a/scripts/plot/plot_border.m b/scripts/plot/plot_border.m
--- a/scripts/plot/plot_border.m
+++ b/scripts/plot/plot_border.m
@@ -53,10 +53,6 @@
 
 function plot_border (varargin)
 
-  if (! gnuplot_has_multiplot)
-    error ("plot_border: gnuplot does not appear to support this feature");
-  endif
-
   south = 0;
   west = 0;
   north = 0;
diff --git a/scripts/plot/subplot.m b/scripts/plot/subplot.m
--- a/scripts/plot/subplot.m
+++ b/scripts/plot/subplot.m
@@ -74,10 +74,6 @@
 
 function subplot (rows, columns, index)
 
-  if (! gnuplot_has_multiplot)
-    error ("subplot: gnuplot does not appear to support this feature");
-  endif
-
   ## global variables to keep track of multiplot options
 
   global __multiplot_mode__ = 0;
diff --git a/scripts/plot/subwindow.m b/scripts/plot/subwindow.m
--- a/scripts/plot/subwindow.m
+++ b/scripts/plot/subwindow.m
@@ -31,10 +31,6 @@
 
 function subwindow (xn, yn)
 
-  if (! gnuplot_has_multiplot)
-    error ("subwindow: gnuplot does not appear to support this feature");
-  endif
-
   ## global variables to keep track of multiplot options
 
   global __multiplot_mode__ = 0;
diff --git a/scripts/plot/top_title.m b/scripts/plot/top_title.m
--- a/scripts/plot/top_title.m
+++ b/scripts/plot/top_title.m
@@ -29,10 +29,6 @@
 
 function top_title (text)
 
-  if (! gnuplot_has_multiplot)
-    error ("top_title: gnuplot does not appear to support this feature");
-  endif
-
   if (nargin != 1)
     usage ("top_title (text)");
   endif
diff --git a/scripts/signal/freqz_plot.m b/scripts/signal/freqz_plot.m
--- a/scripts/signal/freqz_plot.m
+++ b/scripts/signal/freqz_plot.m
@@ -41,25 +41,19 @@
 
       ## Protect graph state.
 
-      if (gnuplot_has_multiplot)
-      	subplot (311);
-      	gset lmargin 10;
-	axis ("labely");
-	xlabel ("");
-      endif
+      subplot (311);
+      gset lmargin 10;
+      axis ("labely");
+      xlabel ("");
       grid ("on");
       axis ([ w(1), w(n), maxmag-3, maxmag ]);
       plot (w, mag, ";Pass band (dB);");
 
-      if (gnuplot_has_multiplot)
-      	subplot (312);
-	axis ("labely");
-	title ("");
-	xlabel ("");
-      	gset tmargin 0;
-      else
-	input ("press any key for the next plot: ");
-      endif
+      subplot (312);
+      axis ("labely");
+      title ("");
+      xlabel ("");
+      gset tmargin 0;
       grid ("on");
       if (maxmag - min (mag) > 100)
       	axis ([ w(1), w(n), maxmag-100, maxmag ]);
@@ -68,13 +62,9 @@
       endif
       plot (w, mag, ";Stop band (dB);");
       
-      if (gnuplot_has_multiplot)
-      	subplot (313);
-	axis ("label");
-	title ("");
-      else
-	input ("press any key for the next plot: ");
-      endif
+      subplot (313);
+      axis ("label");
+      title ("");
       grid ("on");
       axis ("autoy");
       xlabel ("Frequency");
diff --git a/src/ChangeLog b/src/ChangeLog
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,9 @@
+2003-06-04  John W. Eaton  <jwe@bevo.che.wisc.edu>
+
+	* pt-plot.cc (Vgnuplot_has_multiplot): Delete variable.
+	(gnuplot_has_multiplot): Delete.
+	(symbols_of_pt_plot): Delete DEFVAR for gnuplot_has_multiplot.
+
 2003-05-28  Teemu Ikonen <tpikonen@pcu.helsinki.fi>
 
 	* load-save.cc (save_mat5_binary_element, save_mat_binary_data):
diff --git a/src/pt-plot.cc b/src/pt-plot.cc
--- a/src/pt-plot.cc
+++ b/src/pt-plot.cc
@@ -72,9 +72,6 @@
 // TRUE if gnuplot appears to support multiple plot windows with X11.
 static bool Vgnuplot_has_frames;
 
-// TRUE if gnuplot appears to support multiplot.
-static bool Vgnuplot_has_multiplot;
-
 // The number of lines we've plotted so far.
 static int plot_line_count = 0;
 
@@ -1272,14 +1269,6 @@
   return 0;
 }
 
-static int
-gnuplot_has_multiplot (void)
-{
-  Vgnuplot_has_multiplot = check_preference ("gnuplot_has_multiplot");
-
-  return 0;
-}
-
 void
 symbols_of_pt_plot (void)
 {
@@ -1354,22 +1343,6 @@
 can be changed in your startup script or at the command line in case\n\
 configure got it wrong, or if you upgrade your gnuplot installation.\n\
 @end defvr");
-
-#if defined (GNUPLOT_HAS_MULTIPLOT)
-  bool with_multiplot = true;
-#else
-  bool with_multiplot = false;
-#endif
-
-  DEFVAR (gnuplot_has_multiplot, with_multiplot, gnuplot_has_multiplot,
-    "-*- texinfo -*-\n\
-@defvr {Built-in Variable} gnuplot_has_multiplot\n\
-If the value of this variable is nonzero, Octave assumes that your copy\n\
-of gnuplot has the multiplot support that is included in recent\n\
-3.6beta releases.  It's initial value is determined by configure, but it\n\
-can be changed in your startup script or at the command line in case\n\
-configure got it wrong, or if you upgrade your gnuplot installation.\n\
-@end defvr");
 }
 
 /*