【答案】应助回帖

X=[-7.022 -2.391 0.7963 106.444 10e-4 0.365
-7.022 -2.391 0.7963 106.444 10e-3 0.479
-7.022 -2.391 0.7963 106.444 10e-2 0.592
-7.096 -2.524 1.9082 98.851  10e-4 0.427
-7.096 -2.524 1.9082 98.851  10e-3 0.575
-7.096 -2.524 1.9082 98.851  10e-2 0.711
-6.648 -2.392 1.9277 135.257 10e-4 0.595
-6.648 -2.392 1.9277 135.257 10e-3 0.701
-6.648 -2.392 1.9277 135.257 10e-2 0.891];
%====回归法==============
y= X(:,6)./(1-X(:,6));
XX=[X(:,1).*X(:,5) X(:,2).*X(:,5) X(:,3).*X(:,5) X(:,4).*X(:,5) X(:,5)];
[B,BINT,R,RINT,STATS] = REGRESS(y,XX)
rcoplot(R,RINT)
%=========最小二乘法=========
F=@(a,x)(a(1)*x(:,1)+a(2)*x(:,2)+a(3)*x(:,3)+a(4)*x(:,4)+a(5)).*x(:,5)./...
    (1+(a(1)*x(:,1)+a(2)*x(:,2)+a(3)*x(:,3)+a(4)*x(:,4)+a(5)).*x(:,5));
[par,RESNORM,RESIDUAL,EXITFLAG]= lsqcurvefit(F,rand(1,5), X(:,1:5), X(:,6))
%=====结果比较====
YY=XX*B;
Te=YY./(1+YY);
f=F(par,X(:,1:5));
plot(X(:,6),'*-');hold on;plot(Te,'ro-')
hold on;plot(f,'<-g')
legend('原数据','回归法','最小二乘')