fisher算法留一法验证iris数据集matlab实现

function y=fisher_iris（SEVEVI）

S_V=[SE;VE];

ALL_1=[S_V;VI];

for L=1:150
    T=S_V;
    P=VI;
    sample=ALL_1（L:）;
    if L<=100
        T（L:）=[];
    else
        P（L-100:）=[];
    end
    
    R1=size（T1）;
    R2=size（P1）;
    
    a1=mean（T）;
    a2=mean（P）;
    
    s1=cov（T）*（R1-1）;
    s2=cov（P）*（R2-1）;
    
    Sw=s1+s2;
    
    w=inv（Sw）*（a1-a2）‘;
    
    y1=mean（w‘*a1‘）;
    y2=mean（w‘*a2‘）;
    
    w0=1/2*（y1+y2）;
    
    y（L）=w‘*sample‘;
    
    if y（L）>w0;
        y（L）=0;
        
        for L_2=1:100
            T_2=SE;
            P_2=VE;
            sample=S_V（L_2:）;
            if L_2<=50
                T_2（L_2:）=[];
            else
                P_2（L_2-50: