R: Internal function: Invert a permutation

gsi2.invperm {compositions} | R Documentation

## Internal function: Invert a permutation

### Description

Finds the inverse of a permutation given as a vector of indices.

### Usage

    gsi2.invperm( i,n )

### Arguments

`i` | a sequence of different integers in `1:n` considered as a permutation given by `p=unique(c(i,1:n))`
`n` | the number of elements to be permuted

### Details

The inverse permutation is defined by `p[v]==1:n` and `v[p]==1:n`.

### Value

an integer vector v describing the inverse permutation of p.

### Note

Do not use gsi.* functions directly since they are internal functions of the package

### Author(s)

K.Gerald v.d. Boogaart http://www.stat.boogaart.de

### See Also

`gsi`

### Examples

    #gsi2.invperm(c(2,3),10)

[Package compositions version 2.0-2 Index]