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Re: simultaneous fitting [message #56780 is a reply to message #56702]

Mon, 12 November 2007 08:19

virgil1612
Messages: 3
Registered: November 2007

Junior Member

To hradilv:
> You're going to have to reform the problem somehow, probably. Maybe
> you can give some more details?

So it's the same independent variable, values of x between 0 and 1
(phases of a binary star system, representing one complete orbit). I
have two columns of datapoints representing two separate variables,
that I need to simultaneously fit with two functions that are defined
with one common set of parameters. The fitting would give those
parameters.

to craig:
> Fitting programs like LMFIT or MPFIT don't really care how many
> functions you have. If you have two data sets Y1 and Y2, then you can
> "glue" them together with a command like this,
> Y = [Y1, Y2]
> and in your model function, you would do the same thing, something
> like,
> F = [F1(X,P), F2(X,P)]
> where F1() and F2() are your different functions, which are functions
> of the same independent variable and the parameter set P.

Thanks Craig, I'll try to do that.

Cheers, Virgil.

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[Message index]

		Re: simultaneous fitting By: Craig Markwardt on Sat, 10 November 2007 21:01
		Re: simultaneous fitting By: Vince Hradil on Sat, 10 November 2007 11:07
		Re: simultaneous fitting By: virgil1612 on Fri, 09 November 2007 13:20
		Re: simultaneous fitting By: virgil1612 on Mon, 12 November 2007 08:19

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