unpack {Matrix} | R Documentation

## Full Storage Representation of Packed Matrices

### Description

Expands decompositions stored in compact form into matrix factors.

### Usage

    unpack(x, ...)

### Arguments

`x` | a matrix stored in packed form, e.g., of class `"d?pMatrix"` where "?" is "t" for triangular or "s" for symmetric.
`...` | further arguments passed to or from other methods.

### Details

This is a generic function with special methods for different types of packed matrices. Use `showMethods("unpack")` to list the methods for `unpack()`.

### Value

A `Matrix` object containing the full-storage representation of `x`.

### Examples

    showMethods("unpack")
    (cp4 <- chol(Hilbert(4))) # is triangular
    tp4 <- as(cp4,"dtpMatrix")# [t]riangular [p]acked
    str(tp4)
    (unpack(tp4))

    ## Not run:
    ## once we have Diagonal() :
    unpack(Diagonal( 1:3))
    ## End(Not run)

[Package Matrix version 0.999375-33 Index]