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1.oaosvm.m % OAOSVM Multi-class SVM using One-Against-One decomposition. % % Synopsis: % model = oaosvm( data ) % model = oaosvm( data, options ) % % Description: % model = oaosvm( data ) uses one-agains-one deconposition % to train the multi-class Support Vector Machines (SVM) % classifier. The classification into nclass classes % is decomposed into nrule = (nclass-1)*nclass/2 binary % problems. % % model = oaosvm( data, options) allows to specify the % binary SVM solver and its paramaters. % % Input: % data [struct] Training data: % .X [dim x num_data] Training vectors. % .y [1 x num_data] Labels of training data (1,2,...,nclass). % % options [struct] Control parameters: % .solver [string] Function which implements the binary SVM % solver; (default 'smo'). % .verb [1x1] If 1 then a progress info is displayed (default 0). % The other fileds of options specifies the options of the binary % solver (e.g., ker, arg, C). See help of the selected solver. % % Output: % model [struct] Multi-class SVM majority voting classifier: % .Alpha [nsv x nrule] Weights (Lagrangeans). % .bin_y [2 x nrule] Translation between binary responses of % the discriminant functions and class labels. % .b [nrule x 1] Biases of discriminant functions. % .sv.X [dim x nsv] Support vectors. % .nsv [1x1] Number of support vectors. % .trnerr [1x1] Training error. % .kercnt [1x1] Number of kernel evaluations. % .options [struct[ Copy of input argument options. % % Example: % data = load('pentagon'); % options = struct('ker','rbf','arg',1,'C',1000,'verb',1); % model = oaosvm( data, options ); % figure; % ppatterns(data); ppatterns(model.sv.X,'ok',13); % pboundary( model ); % % See also % MVSVMCLASS, OAASVM. % % About: Statistical Pattern Recognition Toolbox % (C) 1999-2003, Written by Vojtech Franc and Vaclav Hlavac % <a href="http://www.cvut.cz">Czech Technical University Prague</a> % <a href="http://www.feld.cvut.cz">Faculty of Electrical Engineering</a> % <a href="http://cmp.felk.cvut.cz">Center for Machine Perception</a> % Modifications: % 26-may-2004, VF % 4-feb-2004, VF % 9-Feb-2003, VF % Process inputs 2.ppatterns.m % PPATTERNS Plots pattern as points in feature space. % % Synopsis: % ppatterns(data,marker_size) % ppatterns(data,'num') % ppatterns(X,marker,marker_size) % ppatterns(X,y) % ppatterns(X,y,marker_size) % ppatterns(X,y,'num') % % Description: % ppatterns(data,marker_size) plots data.X as points % distinguished by marker and its color according to % given labels data.y. The marker size can be prescribed. % % ppatterns(data,'num') plots data.X in distinguished % by numbers and colors according to given labels data.y. % The marker size can be determined by argument marker_size. % % ppatterns(X,marker,marker_size) plots data X. Marker type % can be determined by argument marker. The marker size can % be determined by argument marker_size. % % ppatterns(X,y,...) instead of structure data, which contains % items X and y these can enter the function directly. % % If dimension of input data is greater than 3 then % only first 3 dimensions are assumed and data are plotted % in 3D space. % % Output: % H [struct] Handles of used graphical objects. % % Example: % data = load('riply_trn'); % figure; ppatterns(data); % figure; ppatterns(data,'num'); % figure; ppatterns(data.X,'xk',10); % % See also % PLINE. % % About: Statistical Pattern Recognition Toolbox % (C) 1999-2003, Written by Vojtech Franc and Vaclav Hlavac % <a href="http://www.cvut.cz">Czech Technical University Prague</a> % <a href="http://www.feld.cvut.cz">Faculty of Electrical Engineering</a> % <a href="http://cmp.felk.cvut.cz">Center for Machine Perception</a> % Modifications: % 25-may-2004, VF % 11-mar-2004, VF, % 5-oct-2003, VF, returns handles % 12-feb-2003, VF, 1D, 3D added % 7-jan-2003, VF, created