R: Express Table Entries as Fraction of Marginal Table

prop.table {base} | R Documentation

## Express Table Entries as Fraction of Marginal Table

### Description

This is really `sweep(x, margin, margin.table(x, margin), "/")` for newbies, except that if `margin` has length zero, then one gets `x/sum(x)`.

### Usage

    prop.table(x, margin=NULL)

### Arguments

`x` | table
`margin` | index, or vector of indices to generate margin for

### Value

Table like `x` expressed relative to `margin`

### Author(s)

Peter Dalgaard

### See Also

`margin.table`

### Examples

    m <- matrix(1:4,2)
    m
    prop.table(m,1)

[Package base version 2.15.1 Index]