R: Add margins to a data frame.

add_margins {reshape2} | R Documentation

## Add margins to a data frame.

### Description

Rownames are silently stripped. All margining variables will be converted to factors.

### Usage

    add_margins(df, vars, margins = TRUE)

### Arguments

`df` | input data frame
`vars` | a list of character vectors giving the variables in each dimension
`margins` | a character vector of variable names to compute margins for. `TRUE` will compute all possible margins.

[Package reshape2 version 1.4.3 Index]