m2oban_cssj_som7.asv

本程序研究在单个脉冲发现概率一定的条件下

%SOM神经网络，20051210
%实验类内距离和类内离差阵的关系
%======每5类DOA相差9，检查对DOA的适应情况=DOA变化从3倍sita变化=== 识别率为   100 ========================

[m0,m1,q]=som3(aa,bb)
p=q;
m=m0;
=m1;
grpcount=aa;
n=3;%向量的维数
N=aa*bb;
for i=1:grpcount
    m0{i}=mean(p{i});
end

Jw=0;
for i=1:grpcount
    cc=size(p{i})
    for j=1:cc(1)
        p0=p{i}
     Jw=Jw+(p0(j,:)-m0{i})*(p0(j,:)-m0{i})';   
    end
end
JB=0;
for i=1:grpcount
    JB=JB+(m0{i}-m)*(m0{i}-m)'
end
J1=JB/Jw
%%%%%%
Sw=zeros(n,n)；
for i=1:grpcount
    cc=size(p{i})
    for j=1:cc(1)
        p0=p{i}
     Sw=Sw+(p0(j,:)-m0{i})'*(p0(j,:)-m0{i});   
    end
end
Sw=1/N*Sw;
SB=zeros(n,n)；
for i=1:grpcount
     cc=size(p{i});
   SB=SB+cc(1)/N*(m0{i}-m)*(m0{i}-m)'
end
l=[1,0,0;0,1,0;0,0,1];
J2=sum(sum(l.*(SB*inv(Sw))))