# HG changeset patch
# User Rik <rik@octave.org>
# Date 1388769364 28800
# Node ID 0ecd4618b1fc716f84ec922060c65019ddf660bc
# Parent  b7d3e1f762e12f728a359b67ab878b64aa9ee228
voronoi.m: Fix input validation so it doesn't open blank figure window.

voronoi.m: Fix input validation so it doesn't open blank figure window.

diff -r b7d3e1f762e1 -r 0ecd4618b1fc scripts/geometry/voronoi.m
--- a/scripts/geometry/voronoi.m	Fri Jan 03 11:23:08 2014 -0500
+++ b/scripts/geometry/voronoi.m	Fri Jan 03 09:16:04 2014 -0800
@@ -74,14 +74,13 @@
   endif
 
   narg = 1;
+  hax = NaN;
   if (isscalar (varargin{1}) && ishandle (varargin{1}))
     hax = varargin{1};
     if (! isaxes (hax))
       error ("voronoi: HAX argument must be an axes object");
     endif
     narg++;
-  elseif (nargout < 2)
-    hax = gca ();
   endif
 
   if (nargin < 1 + narg || nargin > 3 + narg)
@@ -159,6 +158,9 @@
   Vvy = reshape (p(edges, 2), size (edges));
 
   if (nargout < 2)
+    if (isnan (hax))
+      hax = gca ();
+    endif
     h = plot (hax, Vvx, Vvy, linespec{:}, x, y, '+');
     lim = [xmin, xmax, ymin, ymax];
     axis (lim + 0.1 * [[-1, 1] * xdelta, [-1, 1] * ydelta]);