condense-ss: Condense

In reshape: Flexibly Reshape Data

Condense

Description

Condense a data frame.

Usage

condense(data, variables, fun, ...)

Arguments

data	data frame
variables	variables to condense over
fun	aggregating function, may multiple values
...	further arguments passed on to aggregating function

Details

Works very much like by, but keeps data in original data frame format. Results column is a list, so that each cell may contain an object or a vector etc. Assumes data is in molten format. Aggregating function must return the same number of arguments for all input.

Author(s)

Hadley Wickham <[e-mail]>

reshape documentation built on April 12, 2022, 5:07 p.m.