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changeset 785:7b7832240e1d

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strel: accept an empty matrix as valid neighborhood.
author Carnë Draug <carandraug@octave.org>
date Tue, 24 Sep 2013 02:38:14 +0100
parents d9b2316985a3
children a8820b3c34cc
files inst/@strel/strel.m
diffstat 1 files changed, 5 insertions(+), 3 deletions(-) [+]
line wrap: on
line diff
--- a/inst/@strel/strel.m
+++ b/inst/@strel/strel.m
@@ -1,5 +1,5 @@
-## Copyright (C) 2012,2013 Roberto Metere <roberto@metere.it>
-## Copyright (C) 2012 Carnë Draug <carandraug@octave.org>
+## Copyright (C) 2012, 2013 Roberto Metere <roberto@metere.it>
+## Copyright (C) 2012, 2013 Carnë Draug <carandraug@octave.org>
 ##
 ## This program is free software; you can redistribute it and/or modify it under
 ## the terms of the GNU General Public License as published by the Free Software
@@ -162,7 +162,9 @@
       else
         error ("strel: an arbitrary shape takes 1 or 2 arguments");
       endif
-      if (! isbw (nhood, "non-logical"))
+      ## isbw returns false in case of an empty matrix but we need
+      ## to support empty strel objects as well.
+      if (! isbw (nhood, "non-logical") && ! isempty (nhood))
         error ("strel: NHOOD must be a matrix with only 0 and 1 values")
       endif