Last data update: 2014.03.03
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R: Longitudinal Class
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(x)
Arguments
x |
An object which is coerced to a lgtdl object for
as.lgtdl or tested with is.lgtdl .
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row.names |
An optional set of row names to be used for the names
of the covariates in the resulting lgtdl object.
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Value
is.lgtdl |
Returns TRUE if its argument is of class
lgtdl .
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as.lgtdl |
Returns an object of class lgtdl .
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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)
Results
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