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)

Arguments

formula

The right hand side of a formula

data

A dataframe

Value

The ordered data frame

Details

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