expand {Matrix} R Documentation

## Expand a (Matrix) Decomposition into Factors

### Description

Expands decompositions stored in compact form into factors.

### Usage

expand(x, ...)


### Arguments

 x a matrix decomposition. ... further arguments passed to or from other methods.

### Details

This is a generic function with special methods for different types of decompositions, see showMethods(expand) to list them all.

### Value

The expanded decomposition, typically a list of matrix factors.

### Note

Factors for decompositions such as lu and qr can be stored in a compact form. The function expand allows all factors to be fully expanded.

The LU lu, and the Cholesky decompositions which have expand methods; facmul.
(x <- Matrix(round(rnorm(9),2), 3, 3))