The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » Inactive » comp.soft-sys.math.mathematica

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: Problem with NonlinearModelFit
Replies: 0  

Advanced Search

Back to Topic List Back to Topic List  
Ludwig Greil

Posts: 1
Registered: 11/21/12
Problem with NonlinearModelFit
Posted: Nov 21, 2012 7:51 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Hello everyone,

I have this problem fitting the Real part of a function that at some point
develops an imaginary part. My dataset is real-valued, and i try fitting
Re[f] and afterwards generating the MeanPredictionBands. The fitting of
the function goes fine, but as soon as i try to create the MeanPredictionBands, i get the following error:

Experimental`NumericalFunction::nnum: The function [...] is not a number at {fitparameters}.

Then I tried a normal function that is real-valued everywhere, and tried fitting Re[f] and then create the MeanPredictionBands and again, the same error appears.

The question I have is basically: Is there a way to do what i want to do?

Thank you all for your help,
Ludwig Greil

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.