Message-ID: <3CA0DD4D.EAED54E3@emory.edu>
Date: 2002-03-26T20:42:53Z
From: Roland Regoes
Subject: anova() for nlm or nls
Dear R community,
I am currently fitting non-linear models using nlm and nls.
1) I would like to compare the different models analogous to the
comparison of linear models with anova(). Is there a function in R which
allows to do that?
2) I would like to constrain the parameter ranges to positive values
only. Is there an option in nlm or nls which allows to constrain
parameter ranges? (So far I constrained them "manually" by incorporating
the constraints into the definition of the functions fitted.)
Thanks for your help,
Roland
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Roland Regoes
Department of Biology
Emory University
1510 Clifton Rd
Atlanta, GA 30322
tel: (404) 727-1765
fax: (404) 727-2880
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