?? svcerror.m
字號:
function err = svcerror(trnX,trnY,tstX,tstY,ker,alpha,bias)
%SVCERROR Calculate SVC Error
%
% Usage: err = svcerror(trnX,trnY,tstX,tstY,ker,alpha,bias)
%
% Parameters: trnX - Training inputs
% trnY - Training targets
% tstX - Test inputs
% tstY - Test targets
% ker - kernel function
% beta - Lagrange Multipliers
% bias - bias
%
% Author: Steve Gunn (srg@ecs.soton.ac.uk)
if (nargin ~= 7) % check correct number of arguments
help svcerror
else
n = size(trnX,1);
m = length(tstY);
H = zeros(m,n);
for i=1:m
for j=1:n
H(i,j) = trnY(j)*svkernel(ker,tstX(i,:),trnX(j,:));
end
end
predictedY = sign(H*alpha + bias);
err = sum(predictedY ~= tstY);
end
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