5楼: Originally posted by cailuncailun at 2015-04-18 13:32:32
会不会是您的模型选得不够好？我用Origin试了下，发现用这个模型拟合的效果还不错：

Data: Data1_F
Model: SRichards1
Equation: if(d<1) y=(a^(1-d)-exp(-k(x-xc)))^(1/(1-d))
if(d>1) y=(a^(1-d)+ex ...