as.lgtdl {lgtdl}R Documentation

Longitudinal Class

Description

as.lgtdl coerces its argument to class lgtdl if possible. is.lgtdl returns TRUE if its argument is of class lgtdl and FALSE otherwise.

Usage

as.lgtdl(x, row.names=NULL)
is.lgtdl(y)

Arguments

x An object to be coerced to a lgtdl object.
row.names An optional set of row names to be used for the names of the covariates in the resulting lgtdl object.
y An object to test whether it is of class lgtdl

Value

is.lgtdl
as.lgtdl

{Returns an object of class lgtdl.}

Author(s)

Robert Gentleman

See Also

plot.lgtdl, lgtdl

Examples

  x1<-data.frame(time=c(1,3,5), cov=c(4,6,8))
  x2<-data.frame(time=c(11,13,15), interest=c(66,45,88))

  x1<-as.lgtdl(x1)
  x2<-as.lgtdl(x2)

  is.lgtdl(TRUE)