.nlmP | R Documentation |
This function adapts the R function nlm
to allow for
constraints (upper and/or lower bounds) in the values of the parameters.
.nlmP(objfunc, params, lower=rep(-Inf, length(params)),
upper=rep(+Inf, length(params)), ...)
objfunc |
the function to be minimized. |
params |
starting values for the parameters. |
lower |
lower bounds for the variables. Defaults to |
upper |
upper bounds for the variables. Defaults to |
... |
further arguments to be passed to the function
|
Constraints on the parameter values are internally imposed by using exponential, logarithmic, and logit transformation of the parameter values.
The output is the same as for the function nlm
.
Patrick E. Brown p.brown@lancaster.ac.uk.
Adapted and included in geoR by
Paulo Justiniano Ribeiro Jr. paulojus@leg.ufpr.br
Further information on the package geoR can be found at:
http://www.leg.ufpr.br/geoR/.
nlm
, optim
.
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