R: Position in a vector of linear independent values

veclipos {miscTools} | R Documentation

## Position in a vector of linear independent values

### Description

Returns the position of the [`i`,`j`]th element of a symmetric `n` x `n` matrix that this element has in a vector of the linear independent values of the matrix.

### Usage

    veclipos( i, j, n )

### Arguments

`i` | row of the element in the matrix.
`j` | column of the element in the matrix.
`n` | dimension of the matrix.

### Note

A symmetric `n` x `n` matrix has n*(n+1)/2 independent values.
The function is: n*(n-1)/2-((n-min(i,j))*(n-min(i,j)+1)/2)+max(i,j)

### Author(s)

Arne Henningsen

### See Also

`vecli`, `vecli2m`.

### Examples

       veclipos( 1, 2, 3 )  # returns: 2

[Package miscTools version 0.6-22 Index]