1 # Copyright (C) 2005 Michael Creel <michael.creel@uab.es>
3 # This program is free software; you can redistribute it and/or modify
4 # it under the terms of the GNU General Public License as published by
5 # the Free Software Foundation; either version 2 of the License, or
6 # (at your option) any later version.
8 # This program is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 # GNU General Public License for more details.
13 # You should have received a copy of the GNU General Public License
14 # along with this program; If not, see <http://www.gnu.org/licenses/>.
16 # usage: [obj_value, score] = nls_obj(theta, data, model, modelargs, nslaves)
18 # Returns the average sum of squared errors for a specified model
19 # This is for internal use by nls_estimate
22 function [obj_value, score] = nls_obj(theta, data, model, modelargs, nslaves)
27 global NEWORLD NSLAVES TAG
28 nn = floor(n/(NSLAVES + 1)); # number of obsns per slave
30 # The command that the slave nodes will execute
31 cmd=['contrib = nls_obj_nodes(theta, data, model, modelargs, nn); ',...
32 'MPI_Send(contrib,0,TAG,NEWORLD);'];
34 # send items to slaves
35 NumCmds_Send({"theta", "nn", "cmd"}, {theta, nn, cmd});
37 # evaluate last block on master while slaves are busy
38 obj_value = nls_obj_nodes(theta, data, model, modelargs, nn);
40 # collect slaves' results
41 contrib = 0.0; # must be initialized to use MPI_Recv
43 MPI_Recv(contrib,i,TAG,NEWORLD);
44 obj_value = obj_value + contrib;
48 obj_value = obj_value / n;
49 score = "na"; # fix this later to allow analytic score in parallel
52 [contribs, score] = feval(model, theta, data, modelargs);
53 obj_value = mean(contribs);
54 if isnumeric(score) score = mean(score)'; endif # model passes "na" when score not available
57 # let's bullet-proof this in case the model goes nuts
58 if (((abs(obj_value) == Inf)) || (isnan(obj_value))) obj_value = realmax; endif