expandDF: Functions to manipulate data frames
In gsk3/taRifx: Collection of utility and convenience functions.

Description Usage Arguments Details Value Examples

expandDF takes a dataframe and replicates the chosen observations n times

  expandDF(df, obs, numtimes = 1)

  splitDF(df, splitvar)

  unsplitDF(splitdfs)

`df`	Data.frame to be manipulated
`obs`	Vector to select rows of df (e.g. vector of row numbers or a boolean of length nrow(df) )
`numtimes`	Number of times to replicate
`splitvar`	Name of variable which defines groups on which df will be split
`splitdfs`	List of data.frames to recombine (generally created by splitDF)

splitDF takes a dataframe and splits it into a bunch of data.frames held in a list, according to one variable

unsplitDF takes a list of data.frames produced by splitDF and returns them as one appended data.frame

expandDF and unsplitDF return a data.frame splitDF returns a list of data.frames

library(datasets)
# Duplicate a dataset
expandDF(sleep,TRUE)
# Expand the final observation
expandDF(sleep,nrow(sleep),numtimes=10)
# Split a data.frame by group
s.df <- splitDF(sleep,'group')
s.df
# Reconstitute original data.frame
unsplitDF(s.df)