# HG changeset patch
# User jwe
# Date 1140120815 0
# Node ID 0f6a0a85a857e0107e0544cf0459bde4bb305712
# Parent  3236b4d98fde9f74ba1d54b35cbab60ecc30279d
[project @ 2006-02-16 20:13:35 by jwe]

diff --git a/scripts/ChangeLog b/scripts/ChangeLog
--- a/scripts/ChangeLog
+++ b/scripts/ChangeLog
@@ -1,3 +1,7 @@
+2006-02-16  Bill Denney <denney@seas.upenn.edu>
+
+ 	* axis.m: Catch limits that are the same and return an error.
+
 2006-02-15  Dmitri A. Sergatskov  <dasergatskov@gmail.com>
 
 	* plot/print.m: Accept emf device option to support Enhanced
diff --git a/scripts/plot/axis.m b/scripts/plot/axis.m
--- a/scripts/plot/axis.m
+++ b/scripts/plot/axis.m
@@ -246,6 +246,12 @@
       error ("axis: expecting vector with 2, 4, or 6 elements");
     endif
 
+    for i = 1:2:len
+      if (ax(i) == ax(i+1))
+	error ("axis: limits(%d) cannot equal limits(%d)", i, i+1);
+      endif
+    endfor
+
     __current_axis__ = reshape (ax, 1, len);
 
     if (len > 1)