plyr: arrange – R documentation

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arrange

Order a data frame by its colums.

Description

This function completes the subsetting, transforming and ordering triad with a function that works in a similar way to subset and transform but for reordering a data frame by its columns. This saves a lot of typing!

Usage

arrange(df, ...)

Arguments

`df`	data frame to reorder
`...`	expressions evaluated in the context of `df` and then fed to `order`

Examples

# sort mtcars data by cylinder and displacement
mtcars[with(mtcars, order(cyl, disp)), ]
# Same result using arrange: no need to use with(), as the context is implicit
# NOTE: plyr functions do NOT preserve row.names
arrange(mtcars, cyl, disp)
# Let's keep the row.names in this example
myCars = cbind(vehicle=row.names(mtcars), mtcars)
arrange(myCars, cyl, disp)
# Sort with displacement in descending order
arrange(myCars, cyl, desc(disp))

plyr

Tools for Splitting, Applying and Combining Data

v1.8.6

MIT + file LICENSE

Authors

Hadley Wickham [aut, cre]

Initial release