Extract corStruct Object Covariate
This method function extracts the covariate(s) associated with
object.
## S3 method for class 'corStruct' getCovariate(object, form, data)
object |
an object inheriting from class |
form |
this argument is included to make the method function
compatible with the generic. It will be assigned the value of
|
data |
an optional data frame in which to evaluate the variables
defined in |
when the correlation structure does not include a grouping factor, the
returned value will be a vector or a matrix with the covariate(s)
associated with object. If a grouping factor is present, the
returned value will be a list of vectors or matrices with the
covariate(s) corresponding to each grouping level.
José Pinheiro and Douglas Bates bates@stat.wisc.edu
Pinheiro, J.C., and Bates, D.M. (2000) "Mixed-Effects Models in S and S-PLUS", Springer.
cs1 <- corAR1(form = ~ 1 | Subject) getCovariate(cs1, data = Orthodont)
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