doBy (version 1.5)

orderBy: Ordering (sorting) rows of a data frame

Description

Ordering (sorting) rows of a data frame by the certain variables in the data frame. This function is essentially a wrapper for the order() function - the important difference being that variables to order by can be given by a model formula.

Usage

orderBy(formula, data, na.last = TRUE, decreasing = FALSE)

Arguments

formula

The right hand side of a formula

data

A data frame

na.last

for controlling the treatment of 'NA's. If 'TRUE', missing values in the data are put last; if 'FALSE', they are put first; if 'NA', they are removed.

decreasing

logical. Should the sort order be increasing or decreasing?

Value

• The ordered data frame

See Also

~~objects to See Also as help, ~~~

Examples

data(dietox)
orderBy(~Time+Evit, data=dietox)