| orderBy(doBy) | R Documentation |
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)
Arguments
formula |
The right hand side of a formula |
data |
A data frame |
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, [email protected] and Kevin Wright
See Also
summaryBy,
transformBy,
splitBy,
lapplyBy,
Examples
data(dietox) orderBy(~Time+Evit, data=dietox) ## Sort decreasingly by Time orderBy(~-Time+Evit, data=dietox)
[Package doBy version 3.9 Index]