matlab聚类算法综合F1值计算

其中A对应混淆矩阵

clc
clear all
% 输入1、2、3选择不同算法，具体顺序如下
x = input('please input a number:');
if x == 1
    A = [10 0; 0 10];
elseif x == 2
    A = [7 3; 2 8];
elseif x == 3
    A = [5 5; 4 6];
end
    ni = []; nj = []; nij = [];
    for i = 1:2
        ni = [ni, sum(A(i,:))];
        nj = [nj, sum(A(:,i))];
        for j = 1:2
            nij = [nij, A(i,j)];
        end
    end
R11 = nij(1,1)/ni(1,1); R12 = nij(1,2)/ni(1,1);
R21 = nij(1,3)/ni(1,2); R22 = nij(1,4)/ni(1,2);
P11 = nij(1,1)/nj(1,1); P12 = nij(1,2)/nj(1,2);
P21 = nij(1,3)/nj(1,1); P22 = nij(1,4)/nj(1,2);
P = [P11 P12 P21 P22]; R = [R11 R12 R21 R22];
F1 = (2 .* P .* R)./(P + R);
F1 = (ni(: , 1) * max(F1(: , 1:2)) + ni(: , 2) * max(F1(: , 3:4)))/20;
c = sprintf('该算法的综合F1值为：%f', F1);
disp(c)