# HG changeset patch
# User jwe
# Date 1192126553 0
# Node ID fa4b43705e3719fddad9a2d2a0a8faca984dc500
# Parent  4a682c7b2bd615bed97cda139019604854075f8a
[project @ 2007-10-11 18:15:53 by jwe]

diff -r 4a682c7b2bd6 -r fa4b43705e37 scripts/ChangeLog
--- a/scripts/ChangeLog	Thu Oct 11 17:54:48 2007 +0000
+++ b/scripts/ChangeLog	Thu Oct 11 18:15:53 2007 +0000
@@ -1,3 +1,12 @@
+2007-10-11  John W. Eaton  <jwe@octave.org>
+
+	* plot/__go_draw_axes__.m (get_axis_limits):
+	Return lim = [] if logscale and no positive values.
+	(__go_draw_axes__): Skip plotting if computed axis limits are empty.
+	Set initial min and min positive values to Inf, max values to -Inf.
+	(get_data_limits): Correctly handle xminp when no positive values
+	are found.
+
 2007-10-11  Ben Abbott  <bpabbott@mac.com>
 
 	* polynomial/residue.m: New optional input for pole multiplicity.
@@ -7,8 +16,6 @@
 
          * toplev.cc (Foctave_config_info): Add field "mac".
 
-2007-10-11  Thomas Treichl  <Thomas.Treichl@gmx.net>
-
 	* miscellaneous/ismac.m: New function.
 	* miscellaneous/Makefile.in (SOURCES): Add it to the list.
 	* miscellaneous/ispc.m, miscellaneous/isunix.m: Doc fix.
@@ -19,12 +26,6 @@
 	as a scalar.  Handle three argument case.  Allow T, M, and N to be
 	scalars or matrices of a common size.
 
-2007-10-11  John W. Eaton  <jwe@octave.org>
-
-	* plot/__go_draw_axes__.m (get_axis_limits):
-	Return lim = [] if logscale and no positive values.
-	(__go_draw_axes__): Skip plotting if computed axis limits are empty.
-
 2007-10-11  Brian Gough  <bjg@network-theory.co.uk>
 
 	* control/csrefcard.lt, control/system/is_detectable.m,
diff -r 4a682c7b2bd6 -r fa4b43705e37 scripts/plot/__go_draw_axes__.m
--- a/scripts/plot/__go_draw_axes__.m	Thu Oct 11 17:54:48 2007 +0000
+++ b/scripts/plot/__go_draw_axes__.m	Thu Oct 11 18:15:53 2007 +0000
@@ -202,9 +202,9 @@
     data = cell ();
     is_image_data = [];
 
-    xminp = yminp = zminp = realmax ();
-    xmax = ymax = zmax = -realmax ();
-    xmin = ymin = zmin = realmax ();
+    xminp = yminp = zminp = Inf;
+    xmax = ymax = zmax = -Inf;
+    xmin = ymin = zmin = Inf;
 
     [view_cmd, view_fcn, view_zoom] = image_viewer ();
     use_gnuplot_for_images = (ischar (view_fcn)
@@ -871,9 +871,14 @@
   xmax = max (xmax, max (xdat));
   if (nargin == 5)
     tx = tx(! isinf (xdat) & tx > 0);
-    xminp = min (xminp, min (tx));
+    if (! isempty (tx))
+      xminp = min (xminp, min (tx));
+    endif
   else
-    xminp = min (xminp, min (xdat(xdat>0)));
+    tmp = min (xdat(xdat > 0));
+    if (! isempty (tmp))
+      xminp = min (xminp, tmp);
+    endif
   endif
 endfunction
 
@@ -884,7 +889,7 @@
 function lim = get_axis_limits (min_val, max_val, min_pos, logscale)
 
   if (logscale)
-    if (isinf (min_pos) || isempty (min_pos))
+    if (isinf (min_pos))
       lim = [];
       warning ("axis: logscale with no positive values to plot");
       return;