parameter estimation of predefined function
1 次查看(过去 30 天)
显示 更早的评论
Hi everyone, I have a function defined as following:
I'd would like to know if there is a Matlab function that can estimate these two parameters given a set of values of (x,y).
With kind regards,
Winn
2 个评论
Matt J
2014-10-28
given a set of values of (x,y).
Are you not also given E(x,y)? You would need that, too.
采纳的回答
Matt J
2014-10-28
编辑:Matt J
2014-10-28
There is lsqcurvefit in the Optimization Toolbox and nlinfit in the Statistics Toolbox. If you have neither, there is fminspleas ( Download ). The latter could be useful, because your model is loglinear in beta
log(E)-log(1-y) = beta*f(x,alpha)
which fminspleas can advantage of. In particular, fitting log(E)-log(1-y) with fminspleas only requires a good initial guess for alpha. The solution fminspleas gives you for both alpha and beta can then be used as initial guesses in a more refined fit.
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Interpolation 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!