Dear Robert,
In general it may be difficult to estimate a model with generic (possibly
nonlinear) functions before/after the changepoint to be estimated too.
However if you are willing to make some restrinctions on your F1(.) and
F2(.), you could semplify the problem..
For instance, have a look
I want to fit a piecewise nonlinear model in which the transition point is
an estimated parameter.
Something like:
F(x)=F1(x) when xalpha,
F(x)=F2(x) when x=alpha.
How can I solve for alpha within the nls call?
Thanks,
Rob
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