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% STK_GET_OPTIMIZABLE_NOISE_PARAMETERS [STK internal]
% Copyright Notice
%
% Copyright (C) 2018 CentraleSupelec
% Copyright (C) 2018 LNE
%
% Authors: Remi Stroh <remi.stroh@lne.fr>
% Julien Bect <julien.bect@centralesupelec.fr>
% Copying Permission Statement
%
% This file is part of
%
% STK: a Small (Matlab/Octave) Toolbox for Kriging
% (https://github.com/stk-kriging/stk/)
%
% 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 [noiseparam, isnoisy] = stk_get_optimizable_noise_parameters (model)
stk_assert_model_struct (model);
isnoisy = stk_isnoisy (model);
if isnoisy
noiseparam = model.lognoisevariance;
if isnumeric (noiseparam)
if ~ isscalar (noiseparam)
% Old-style heteroscedastic case: don't optimize
noiseparam = [];
end
else % model.lognoisevariance is a parameter object
noiseparam = stk_get_optimizable_parameters (noiseparam);
end
else
noiseparam = [];
end
end % function
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