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5Â¥: Originally posted by hollya at 2019-07-23 03:45:31
a=
f=@(k,x) k(1)*k(2)*k(3)*x./((1-k(2)*x).*(1-k(2)*x+k(3)*k(2)*x))
% k(1)=m,k(2)=k,k(3)=c
k0=
for ii=1:10
    k=lsqcurvefit(f,k0,a(:,1),a(:,2))
    k0=k
end
plot(a(:,1),a(:,2),'o',a(:,1),f(k, ...

7Â¥: Originally posted by hollya at 2019-07-23 04:03:17
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R_sq=1-sum((a(:,2)-f(k,a(:,1))).^2)/sum((a(:,2)-mean(a(:,1))).^2)

ËãÍêR^2=0.9994
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9Â¥: Originally posted by hollya at 2019-07-23 04:16:51
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9Â¥: Originally posted by hollya at 2019-07-23 04:16:51
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14Â¥: Originally posted by hollya at 2019-07-25 18:32:39
a=
f=@(k,x) k(1)*k(2)*x.*((1-k(4)*(1-k(3))*x))./((1+k(2)*x).*(1-k(4)*x))
% k(1)=m,k(2)=K,k(3)=w,k(4)=k
k0=
for ii=1:10
    k=lsqcurvefit(f,k0,a(:,1),a(:,2))
    k0=k
end
plot(a(:,1),a(:,2),' ...

13Â¥: Originally posted by dingd at 2019-07-25 10:01:32
ÊÔÏÂ1stOpt£¬²»Óò³õÖµ£º

Function y=m*K*x*(1-k1*(1-w)*x)/((1+K*x)*(1-k1*x));
Data;
x=0,5,10,15,20,25,30,40,50,60,70,75,80,85,90,95,98;
y=0,2.45198,3.41962,4.25807,4.98196,5.69367,6.31764,7.7873 ...