onevsalltest.m

崭新矢量机SVM源码

function [result,vote] = onevsalltest(testsamples,testlabels,samples,labels,kernel,kernelparam,alpha,svi,bias,func)

% multiclass classification using one-against-all
% test function

nlabels = max(labels);
N = size(testsamples,1);
vote = [];
vote = zeros(N,nlabels);
cmatrix = zeros(N,nlabels);
for i=1:nlabels;
    index1 = find(labels == i);
    index2 = 1:length(labels);
    index2(index1) = [];
    index2 = index2(:);
    sublabels(index1,1) = 1;
    sublabels(index2,1) = -1;
    
    switch func
    case 'fsals_svm'
        subresult = fsals_svmtest(testsamples',(samples(svi{i},:))',sublabels(svi{i}),kernel,kernelparam,alpha{i},bias(i)); 
    case 'pfsals_svm'
        subresult = fsals_svmtest(testsamples',(samples(svi{i},:))',sublabels(svi{i}),kernel,kernelparam,alpha{i},bias(i)); 
    end
    
    cmatrix(:,i) = subresult;
    i=i+1;
end;
[maxi,result] = max(cmatrix,[],2);