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% STK_NORMALIZE [overload STK function]
% Copyright Notice
%
% Copyright (C) 2013, 2014 SUPELEC
%
% Author: Julien Bect <julien.bect@supelec.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 x = stk_normalize (x, varargin)
if (~ isa (x, 'stk_factorialdesign'))
% One of the box arguments is an stk_factorialdesign object
stk_error (['stk_factorialdesign objects cannot be used as values ' ...
'for ''box'' arguments.'], 'TypeMismatch');
end
% Normalize using @stk_dataframe/stk_normalize
[x.stk_dataframe, a, b] = stk_normalize (x.stk_dataframe, varargin{:});
for j = 1:(length (x.levels))
x.levels{j} = a(j) + b(j) * x.levels{j};
end
end % function stk_normalize
%!test
%! x = stk_factorialdesign ({[1 2], [5 6]});
%! y = stk_factorialdesign ({[0 1], [0 1]});
%! assert (stk_isequal_tolabs (stk_normalize (x), y))
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