# HG changeset patch
# User Rik <rik@octave.org>
# Date 1379626845 25200
# Node ID 93d2239b7fe9b85ca6944b03f5394ceefc765d4a
# Parent  359366a4994f8f9132fdcc98605b0652feea0697
waitforbuttonpress.m: Change return value 'a' to 'b' to match documentation.

* scripts/plot/waitforbuttonpress.m: Change return value 'a' to 'b' to match
documentation.  Add %!error tests for input validation.

diff -r 359366a4994f -r 93d2239b7fe9 scripts/plot/waitforbuttonpress.m
--- a/scripts/plot/waitforbuttonpress.m	Thu Sep 19 14:26:47 2013 -0700
+++ b/scripts/plot/waitforbuttonpress.m	Thu Sep 19 14:40:45 2013 -0700
@@ -18,7 +18,7 @@
 
 ## -*- texinfo -*-
 ## @deftypefn  {Function File} {} waitforbuttonpress ()
-## @deftypefnx {Function File} {@var{b} =} waitforbuttonpress ()
+## @deftypefnx {Function File} {@var{a} =} waitforbuttonpress ()
 ## Wait for mouse click or key press over the current figure window.
 ##
 ## The return value of @var{b} is 0 if a mouse button was pressed or 1 if a
@@ -30,7 +30,7 @@
 ## Author: Petr Mikulik
 ## License: public domain
 
-function a = waitforbuttonpress ()
+function b = waitforbuttonpress ()
 
   if (nargin != 0 || nargout > 1)
     print_usage ();
@@ -40,11 +40,16 @@
 
   if (nargout == 1)
     if (k <= 5)
-      a = 0;
+      b = 0;
     else
-      a = 1;
+      b = 1;
     endif
   endif
 
 endfunction
 
+
+%% Test input validation
+%!error waitforbuttonpress (1)
+%!error [a,b,c] = waitforbuttonpress ()
+