R: Condense

condense {reshape} | R Documentation

## 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 <h.wickham@gmail.com>

[Package reshape version 0.8.7 Index]