by-order: Ordering (sorting) rows of a data frame

In doBy: Groupwise Statistics, LSmeans, Linear Estimates, Utilities

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

order_by(data, formula)

orderBy(formula, data)

Arguments

data	A dataframe
formula	The right hand side of a formula

Details

The sign of the terms in the formula determines whether sorting should be ascending or decreasing; see examples below

Value

The ordered data frame

Author(s)

Søren Højsgaard, [e-mail] and Kevin Wright

See Also

transformBy, transform_by, splitBy, split_by

Examples

orderBy(~ conc + Treatment, CO2)
## Sort decreasingly by conc
orderBy(~ - conc + Treatment, CO2)
## Same as:
order_by(CO2, c("conc", "Treatment"))
order_by(CO2, c("-conc", "Treatment"))

doBy documentation built on June 30, 2025, 1:06 a.m.