500时W_00=-(m_11+m_22)/2;w1=(m_11-m_22)*inv(SW2);%投影向量Sk1=w1(:,2)/w1(:,1);%最优投影方向直线的斜率。x1=[-7:0.01:7];y1=k1*(x1-W_00(:,1))+W_00(:,2);%最优投影方向直线figure(4);plot(r_11(:,1),r_11(:,2),'g.');title('样本数为500时的样本分布图');holdon;plot(r_22(:,1),r_22(:,2),'*');plot(W_00(1),W_00(2),'+');plot(x1,y1,'r');%画出最优投影方向直线A2=[k1-1;1k1];X2=zeros(2,N_1);forn=1:N_1b2=[k1*W_00(:,1)-W_00(:,2)r_11(n,1)+k1*r_11(n,2)]';X2(:,n)=inv(A2)*b2;endA3=[k1-1;1k1];X3=zeros(2,N_1);forn=1:N_1b3=[k1*W_00(:,1)-W_00(:,2)r_22(n,1)+k1*r_22(n,2)]';X3(:,n)=inv(A3)*b3;endplot(X2(1,:),X2(2,:),'g');plot(X3(1,:),X3(2,:),'b');holdoff;en11=0;en22=0;form=1:N_1ifX2(1,m)>W_00(:,1)en11=en11+1;endifX3(1,m)<W_00(:,1)en22=en22+1;endendp11=en11/N_1;%类一错误率p22=en22/N_1;%类二错误率p00=(en11+en22)/(2*N_1);%平均错误率Pw11=0.5;Pw22=0.5;Pbayes2=Pw11*p11+Pw22*p22;%Bayes决策错误率
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