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% STD [overload base function]
% Copyright Notice
%
% Copyright (C) 2013 SUPELEC
%
% Author: Julien Bect <julien.bect@centralesupelec.fr>
% Copying Permission Statement
%
% This file is part of
%
% STK: a Small (Matlab/Octave) Toolbox for Kriging
% (http://sourceforge.net/projects/kriging)
%
% STK 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.
%
% STK 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 STK. If not, see <http://www.gnu.org/licenses/>.
function z = std(x, flag, dim)
if nargin < 2, flag = 0; end % default: normalize by N-1
if nargin < 3, dim = 1; end % default: act along columns
z = apply(x, dim, @std, flag);
end % function
%!shared x1, df1
%! x1 = rand(9, 3);
%! df1 = stk_dataframe(x1, {'a', 'b', 'c'});
%!assert (isequal (std(df1), std(x1)))
%!assert (isequal (std(df1, 0, 1), std(x1)))
%!assert (isequal (std(df1, 0, 2), std(x1, 0, 2)))
%!assert (isequal (std(df1, 1), std(x1, 1)))
%!assert (isequal (std(df1, 1, 1), std(x1, 1)))
%!assert (isequal (std(df1, 1, 2), std(x1, 1, 2)))
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