by-split {doBy}R Documentation

Split a data frame

Description

Split a dataframe according to the levels of variables in the dataframe. The variables to split by can be given as a formula or as a character vector.

Usage

split_by(data, formula, drop = TRUE)

splitBy(formula, data = parent.frame(), drop = TRUE)

Arguments

data

A data frame

formula

Variables to split data frame by, as ‘as.quoted’ variables, a formula or character vector.

drop

Logical indicating if levels that do not occur should be dropped. Deprecated; levels that do not occur are ignored.

Value

A list of dataframes.

Author(s)

Søren Højsgaard, sorenh@math.aau.dk

See Also

orderBy, summaryBy, transformBy

Examples


data(dietox, package="doBy")
splitBy(formula = ~Evit + Cu, data = dietox)
splitBy(formula = c("Evit", "Cu"), data = dietox)

splitBy(~Month, data=airquality)
splitBy("Month", data=airquality)
[Package doBy version 4.6.6 Index]