function demecoc1()% DEMECOC1 - Demo program for error correcting output codes% %   DEMECOC1%   Show a simple multi class problem (VOWEL-CONTEXT from UCI archive)%   with ECOC and Support Vector Machine as the base learner.%%   See also ECOC, ECOCLOAD, ECOCTRAIN, ECOCFWD%% % Copyright (c) by Anton Schwaighofer (2001)% $Revision: 1.2 $ $Date: 2002/01/07 20:52:34 $% mailto:anton.schwaighofer@gmx.net% % This program is released unter the GNU General Public License.% load('demecoc1.mat', 'Xtrain', 'Ytrain', 'Xtest', 'Ytest');[N, d] = size(Xtrain);% 11 class problem, solve with 14 bit codenet = ecoc(11,14);net.verbosity = 2;% Load code matrix from given filenet = ecocload(net, 'code14-11');% For a 12 class problem with 15 bit code, Dietterichs archive provides a% code. This code can be loaded by% net = ecoc(12, 15);% net.codepath = '/some/path/to/' where ecoc-codes.tar.gz resides% net = ecocload(net);% Initialise an instance of the base learning algorithmlearner = svm(d, 'rbf', 0.5, 1);learner.recompute = Inf;% Train the individual bit learners, all starting out from the parameter% setting in the SVM structure LEARNERwarning off;fprintf('Starting the training.\n');fprintf('This may take a while, since we need to train one SVM per bit ...\n');net = ecoctrain(net, learner, Xtrain, Ytrain+1);pred = ecocfwd(net, Xtest);fprintf('Classification result on the test set: %i out of %i correct\n', ...        length(find((Ytest+1)==pred)), length(Ytest));