[R] Multiresponse parameter estimation

Douglas Bates bates at stat.wisc.edu
Mon Sep 10 17:20:28 CEST 2001

Mark Schaffer <schaffer at chee.queensu.ca> writes:

> I am looking for a way to do multiresponse parameter estimation for a 
> problem that is quite similar in form to the alpha-pinene example in Bates 
> and Watts (1988), p. 147, where the model is a set of ODEs.  I am 
> specifically interested in obtaining the parameter covariance matrix, as 
> well.  Which package(s) in R would I use to do such a thing?

I don't think multiresponse parameter estimation in that sense has been
implemented in R.  It could be added to the nls function but that
would require some rather sophisticated programming and I don't have
time to do that right now.  I could advise someone who wanted to try.

There is an odesolve package that you may want to consider for solving
the ODE's.
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