R: Lower triangle portion of a matrix

lower.triangle {matrixcalc} | R Documentation

## Lower triangle portion of a matrix

### Description

Returns the lower triangle including the diagonal of a square numeric matrix.

### Usage

    lower.triangle(x)

### Arguments

`x` | a matrix

### Value

A matrix.

### Author(s)

Frederick Novomestky fnovomes@poly.edu

### References

Bellman, R. (1987). Matrix Analysis, Second edition, Classics in Applied Mathematics, Society for Industrial and Applied Mathematics.

### See Also

`is.square.matrix`

### Examples

    B <- matrix( seq( 1, 16, 1 ), nrow=4, byrow=TRUE )
    lower.triangle( B )

[Package matrixcalc version 1.0-3 Index]