svm_training.m

基于支持向量机算法的分类程序

function W=Training(Sample1,Sample2);
[N1,l]=size(Sample1);
[N2,l]=size(Sample2);
N=N1+N2;
x=[Sample1;Sample2];
Y=zeros(N,1);
W=zeros(l,1);
X0=Y
Y(1:N1)=1;
Y(N1+1:N)=-1;
H=zeros(N,N);
f=-ones(N,1);
A=Y';
b=0;
C=10;
for i=1:N
    for j=1:N
        H(i,j)=Y(i)*Y(j)*x(i,:)*x(j,:)';
    end
end
VLB=zeros(N,1);
VUB=C*ones(N,1);
L=QUADPROG(H,f,[],[],A,b,VLB,VUB,X0)
for i=1:N
    W=W+L(i)*Y(i)*x(i,:)';
end
[Lmax,i]=max(L);
W0=Y(i)-W'*x(i,:)';
W=[W;W0]';