R: A function to reverse the role of names and values in a list.

reverseSplit {Biobase} | R Documentation

## A function to reverse the role of names and values in a list.

### Description

Given a list with names `x` and values in a set `y` this function returns a list with names in `y` and values in `x`.

### Usage

    reverseSplit(inList)

### Arguments

`inList` | A named list with values that are vectors.

### Details

First the list is unrolled to provide a two long vectors, names are repeated, once for each of their values. Then the names are `split` by the values.

This turns out to be useful for inverting mappings between one set of identifiers and an other.

### Value

A list with length equal to the number of distinct values in the input list and values from the names of the input list.

### Author(s)

R. Gentleman

### See Also

`split`

### Examples

     l1 = list(a=1:4, b=c(2,3), d=c(4,5))
     reverseSplit(l1)

[Package Biobase version 2.8.0 Index]