利用MATLAB实现模糊综合评价数学建模算法

clc;clear all;close all;%清空环境 %step1确定评价对象，建立评价指标体系，构造指标水平矩阵 x=[35,50,50,2,40,160; 75,150,150,4,80,200; 115,250,475,14,180,300; 150,350,800,24,280,400]; [rows,cols]=size(x); % 输入矩阵的大小,rows为对象个数，cols为指标个数 %step2 xmin = min(x); xmax = max(x); A = max(x) - min(x);% y = x - repmat(xmin,rows,1);% for j = 1 : size(y,2); y(:,j) = y(:,j)/A(j);% end %step3 S = sum(y,1); Y = zeros(rows,cols); for i = 1 : size(Y,2); Y(:,i) = y(:,i)/S(i); end lnYij=zeros(rows,cols); % for i=1:rows for j=1:cols if Y(i,j)==0 lnYij(i,j)=0; else lnYij(i,j)=log(Y(i,j)); end end end k=1/log(rows); % Hj=-k*(sum(Y.*lnYij,1)); % %step4 w=(1-Hj)/(cols-sum(Hj))% %step5 F = zeros(rows,cols); for k = 1 : size(x,2); F(:,k) = w(k)*y(:,k); end format long% F = sum(F,2); %