balanced: a general purpose function you can use to get balanced data.

In ShouyeLiu/metaboliteUtility:

Description

a general purpose function you can use to get balanced data.

Usage

balanced(data, ID, TIME, VARS, required = c("all", "shared"))

Arguments

data	the data.frame you wish to subset
ID	a character vector of column names that identify each "person" in the data set
TIME	a character vector specifying the different observation times for each ID
VARS	argument to specify which fields must be NA
required	states whether each ID must have an observation for every TIME (default) or if you set it to "shared", it will only return the TIMES that all IDs have non-missing values for.

Examples

unbal <- data.frame(PERSON=c(rep('Frank',5),rep('Tony',5),rep('Edward',5)), YEAR=c(2001,2002,2003,2004,2005,2001,2002,2003,2004,2005,2001,2002,2003,2004,2005), Y=c(21,22,23,24,25,5,6,NA,7,8,31,32,33,34,35), X=c(1:15))
balanced(unbal, "PERSON","YEAR")
balanced(unbal, "PERSON","YEAR", "X")
balanced(unbal, "PERSON","YEAR", required="shared")

ShouyeLiu/metaboliteUtility documentation built on May 6, 2019, 9:07 a.m.