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parameter constraints with genfit?

ptc-2930462
1-Newbie

parameter constraints with genfit?

Is it possible to include parameter constraints when using genfit? If so, how is it implemented?

I need to fit a non-linear equation (Richards function) and genfit crashes with the current setting. I supply all the derivative functions with respect to the parameters.

Any insight is greatly appreciated.

Ulrich Hopfer

1 ACCEPTED SOLUTION

Accepted Solutions

Genfit only uses the derivatives with respect to the fitted parameters. I looked up the algorithm for the Levenberg-Marquardt method for non-linearized fitting.

View solution in original post

6 REPLIES 6

I would suggest posting a worksheet.

I have added the worksheet to my question on constrains with genfit, as suggested by Mike.

Ulrich

You forgot to upload the data

Yet another thread which is more than one hour old and did show up for me 15 minutes ago. Looks like its getting worse.

It seems to be worse tonight. Maybe PTC are playing tricks on us :-).

Genfit only uses the derivatives with respect to the fitted parameters. I looked up the algorithm for the Levenberg-Marquardt method for non-linearized fitting.

View solution in original post

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