nlformula {lme4}  R Documentation 
Manipulate a Nonlinear Model Formula
Description
Check and manipulate the formula for a nonlinear model, such as
specified in nlmer
.
Usage
nlformula(mc)
Arguments
mc 
matched call from the calling function, typically

Details
The model formula for a nonlinear mixedeffects model is
of the form resp ~ nlmod ~ mixed
where
resp
is an expression (usually just a name) for
the response, nlmod
is the call to the nonlinear
model function, and mixed
is the mixedeffects
formula defining the linear predictor for the parameter
matrix. If the formula is to be used for optimizing
designs, the resp
part can be omitted.
Value
a list with components
"respMod" 
a response module of class 
"frame" 
the model frame, including a terms attribute 
"X" 
the fixedeffects model matrix 
"reTrms" 
the randomeffects terms object 
See Also
Other utilities: findbars
,
mkRespMod
, mkReTrms
,
nobars
, subbars