nonlinear fit question
- To: mathgroup at smc.vnet.net
- Subject: [mg60823] nonlinear fit question
- From: Kevin Towles <kbt22 at drexel.edu>
- Date: Thu, 29 Sep 2005 05:42:21 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
I am trying to do a nonlinear fit using a model I have developed. My
problem is that my model is discontinuous and I only want to allow
the NonlinearFit function to search a range for the value of one of
the parameters. The actual implementation would be something like:
NonlinearFit[data,Model[xVar,yParam],xVar,yParam]
but I want yParam to be confined to a range as: ymin <= yParam <= ymax
I tried using NonlinearFit[data,Model[xVar,yParam],xVar,{yParam,
{ymin,ymax}}] but the function is obviously searching outside this
range. I know there is a good fit in the range that I am specifying,
so I don't know why it insists on searching outside the start
values. Is there a way to confine my yParam?
Any help is greatly appreciated.
Kevin Towles