selectVariable: Select variables to keep or drop.
In epifit: Flexible Modelling Functions for Epidemiological Data Analysis

Description Usage Arguments Value Examples

Select variables to keep or drop and a data frame in which variables are kept or dropped is returned.

1	selectVariable(data = NULL, keep = NULL, drop = NULL)

`data`	a data frame in which variables are included.
`keep`	a character vector specifying variables to keep.
`drop`	a character vector specifying variables to drop.

a data frame in which variables are kept or dropped.

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df <- data.frame(id=seq(1,10), str=letters[1:10], fac=factor(seq(1,10)), stringsAsFactors=FALSE)
selectVariable(df, keep=c("id", "str"))
selectVariable(df, drop=c("fac"))