update packages

[CreaPhase.git] / octave_packages / m / miscellaneous / delete.m

diff --git a/octave_packages/m/miscellaneous/delete.m b/octave_packages/m/miscellaneous/delete.m
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+## Copyright (C) 2004-2012 John W. Eaton
+##
+## This file is part of Octave.
+##
+## Octave 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 Foundation; either version 3 of the License, or (at
+## your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+## General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn  {Function File} {} delete (@var{file})
+## @deftypefnx {Function File} {} delete (@var{handle})
+## Delete the named file or graphics handle.
+##
+## Deleting graphics objects is the proper way to remove
+## features from a plot without clearing the entire figure.
+## @seealso{clf, cla, unlink}
+## @end deftypefn
+
+## Author: jwe
+
+function delete (arg)
+
+  if (nargin != 1)
+    print_usage ();
+  endif
+
+  if (ischar (arg))
+    files = glob (arg);
+    if (isempty (files))
+      warning ("delete: no such file: %s", arg);
+    endif
+    for i = 1:length (files)
+      file = files{i};
+      [err, msg] = unlink (file);
+      if (err)
+        warning ("delete: %s: %s", file, msg);
+      endif
+    endfor
+  elseif (all (ishandle (arg(:))))
+    ## Delete a graphics object.
+    __go_delete__ (arg);
+  else
+    error ("delete: first argument must be a filename or graphics handle");
+  endif
+
+endfunction
+
+
+%% Test input validation
+%!error delete ()
+%!error delete (1, 2)
+%!error <first argument must be a filename> delete (struct ())
+