function [y] = gaussian(xx, u, a) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % GAUSSIAN PEAK INTEGRAND FAMILY % % Authors: Sonja Surjanovic, Simon Fraser University % Derek Bingham, Simon Fraser University % Questions/Comments: Please email Derek Bingham at dbingham@stat.sfu.ca. % % Copyright 2013. Derek Bingham, Simon Fraser University. % % THERE IS NO WARRANTY, EXPRESS OR IMPLIED. WE DO NOT ASSUME ANY LIABILITY % FOR THE USE OF THIS SOFTWARE. If software is modified to produce % derivative works, such modified software should be clearly marked. % Additionally, this program 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; version 2.0 of the License. % Accordingly, this program 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. % % For function details and reference information, see: % http://www.sfu.ca/~ssurjano/ % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % INPUTS: % % xx = [x1, x2, ..., xd] % u = [u1, u2, ..., ud] (optional), with default value % [0.5, 0.5, ..., 0.5] % a = [a1, a2, ..., ad] (optional), with default value [5, 5, ..., 5] % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% d = length(xx); if (nargin == 1) u = repmat(0.5, 1, d); a = repmat(5, 1, d); elseif (nargin == 2) a = repmat(5, 1, d); end sum = 0; for ii = 1:d xi = xx(ii); ai = a(ii); ui = u(ii); new = ai^2 * (xi-ui)^2; sum = sum + new; end y = exp(-sum); end