.\" -*- nroff -*- generated from .Rd format
.BG
.FN getStrata
.TL
Extract Stratification Variable
.DN
This function is generic; method functions can be written to handle
specific classes of objects. Classes which already have methods for
this function include `data.frame'.
.CS
getStrata(object, ...)
.RA
.AG object
any object
.AG ...
some methods for this generic function may require additional
arguments.
.RT
will depend on the method function used; see the appropriate documentation.

.SA
`getStrataFormula', `getStrata.data.frame'
.EX
## see the method function documentation
.KW models
.WR
