lme4 (version 1.1-9)

nlformula: 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 nlmer(). 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