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% BSXFUN [overload base function]
% Copyright Notice
%
% Copyright (C) 2013 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 y = bsxfun (F, x1, x2)
%---- Compute ydata -----------------------------------------------------
x1data = double (x1);
x2data = double (x2);
try
ydata = bsxfun (F, x1data, x2data);
catch
err = lasterror ();
if strcmp (err.identifier, 'MATLAB:bsxfun:unsupportedBuiltin')
% This happens in some old versions of Matlab with realpow, for
% instance. Let's try without singleton expansion...
ydata = feval (F, x1data, x2data);
% TODO: manual bsxfun !!!
else
rethrow (err);
end
end
%---- Choose column names -----------------------------------------------
if isa (x1, 'stk_dataframe'),
c1 = x1.colnames;
else
c1 = {};
end
if isa (x2, 'stk_dataframe'),
c2 = x2.colnames;
else
c2 = {};
end
if isempty (c1)
colnames = c2;
elseif isempty (c2)
colnames = c1;
else
if (~ isequal (size (c1), size (c2))) || (any (~ strcmp (c1, c2)))
warning ('STK:bsxfun:IncompatibleColumnNames', ...
'Incompatible column names.'); colnames = {};
else
colnames = c1;
end
end
%--- Create output ------------------------------------------------------
y = stk_dataframe (ydata, colnames);
end % function bsxfun
% DESIGN NOTES
%
% Starting from STK 2.2.0, the result of bsxfun is ALWAYS an
% stk_dataframe object, and has column names iff
% * either one of the two arguments doesn't have columns names
% * or the columns names of both arguments agree.
%
% With this design choice, we ensure that if the underlying operation F
% is commutative on double-precision arrays, then it stays commutative
% on stk_dataframe objects.
%!shared x1, x2, data1, data2
%! x1 = rand (3, 2); data1 = stk_dataframe (x1);
%! x2 = rand (3, 2); data2 = stk_dataframe (x2);
%!test
%! z = bsxfun (@plus, data1, x2);
%! assert (isa (z, 'stk_dataframe') && isequal (double (z), x1 + x2))
%!test
%! z = bsxfun (@plus, x1, data2);
%! assert (isa (z, 'stk_dataframe') && isequal (double (z), x1 + x2))
%!test
%! z = bsxfun (@plus, data1, data2);
%! assert (isa (z, 'stk_dataframe') && isequal (double (z), x1 + x2))
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