Filter löschen
Filter löschen

parameter estimation of predefined function

2 Ansichten (letzte 30 Tage)
Win co
Win co am 28 Okt. 2014
Kommentiert: Win co am 28 Okt. 2014
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 Kommentare
Matt J
Matt J am 28 Okt. 2014
given a set of values of (x,y).
Are you not also given E(x,y)? You would need that, too.
Win co
Win co am 28 Okt. 2014
good remark! Indeed, E is given too.

Melden Sie sich an, um zu kommentieren.

Akzeptierte Antwort

Matt J
Matt J am 28 Okt. 2014
Bearbeitet: Matt J am 28 Okt. 2014
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.
  1 Kommentar
Win co
Win co am 28 Okt. 2014
Thank you so much for this indication. It resolves my problem as I wished.

Melden Sie sich an, um zu kommentieren.

Weitere Antworten (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by