# HG changeset patch
# User John W. Eaton <jwe@octave.org>
# Date 1258710557 -3600
# Node ID b8fa8cba212f8afd565411f6273a34e284bec096
# Parent  51b151af0ddc8be0313af26885f8a704d183ff5b
stairs.m (__stairs__): correct nargin check; new demos

diff -r 51b151af0ddc -r b8fa8cba212f scripts/ChangeLog
--- a/scripts/ChangeLog	Fri Nov 20 10:48:23 2009 +0100
+++ b/scripts/ChangeLog	Fri Nov 20 10:49:17 2009 +0100
@@ -1,3 +1,8 @@
+2009-11-11  John W. Eaton  <jwe@octave.org>
+
+	* plot/stairs.m (__stairs__): Correct nargin check.  New demos.
+	From Jakub Kasse <jakub.kasse@tul.cz>.
+
 2009-09-01  Christophe Tournery  <christophe.tournery@illusonic.com>
 
 	* audio/wavread.m: Rename data_size from obsolete ck_size.
diff -r 51b151af0ddc -r b8fa8cba212f scripts/plot/stairs.m
--- a/scripts/plot/stairs.m	Fri Nov 20 10:48:23 2009 +0100
+++ b/scripts/plot/stairs.m	Fri Nov 20 10:49:17 2009 +0100
@@ -80,7 +80,7 @@
 
 function [h, xs, ys] = __stairs__ (doplot, varargin)
 
-  if (nargin == 1 || ischar (varargin{2}))
+  if (nargin == 2 || ischar (varargin{2}))
     y = varargin {1};
     varargin(1) = [];
     if (ismatrix (y))
@@ -217,6 +217,13 @@
 %! [xs, ys] = stairs (x, y);
 %! plot (xs, ys);
 
+%!demo
+%! stairs (1:9);
+
+%!demo
+%! [xs, ys] = stairs (9:-1:1);
+%! plot (xs, ys);
+
 function update_props (h, d)
   set (get (h, "children"), "color", get (h, "color"), 
        "linewidth", get (h, "linewidth"),