lme4 (version 1.0-6)

nlformula: Manipulate a nonlinear model formula.

Description

Check and manipulate the formula for a nonlinear model.

Usage

nlformula(mc)

Arguments

mc

matched call from the calling function. Should have arguments named [object Object],[object Object],[object Object]

Value

• a list with components
• "respMod"
  a response module of class "nlsResp"
• "frame"
  the model frame, including a terms attribute
• "X"
  the fixed-effects model matrix
• "reTrms"
  the random-effects terms object

Details

The model formula for a nonlinear mixed-effects 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 mixed-effects 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.

See Also

Other utilities: findbars, mkRespMod, mkReTrms, nobars, subbars