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## Copyright (C) 1996-2013 Kurt Hornik
##
## 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} {} blanks (@var{n})
## Return a string of @var{n} blanks, for example:
##
## @example
## @group
## blanks (10);
## whos ans
## @result{}
## Attr Name Size Bytes Class
## ==== ==== ==== ===== =====
## ans 1x10 10 char
## @end group
## @end example
## @seealso{repmat}
## @end deftypefn
## Author: Kurt Hornik <Kurt.Hornik@wu-wien.ac.at>
## Adapted-By: jwe
function s = blanks (n)
if (nargin != 1)
print_usage ();
elseif (! (isscalar (n) && n == fix (n) && n >= 0))
error ("blanks: N must be a non-negative integer");
endif
## If 1:n is empty, the following expression will create an empty
## character string. Otherwise, it will create a row vector.
s(1:n) = " ";
endfunction
## There really isn't that much to test here
%!assert (blanks (0), "")
%!assert (blanks (5), " ")
%!assert (blanks (10), " ")
%% Test input validation
%!error blanks ()
%!error blanks (1, 2)
%!error blanks (ones (2))
%!error blanks (2.1)
%!error blanks (-2)
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