QR decomposition of an amatrix object

Computes the QR decomposition of a matrix or aMatrix, routing to a backend-specific implementation when available.

Usage

am_qr(x, ...)

Arguments

x

A matrix or aMatrix object.

...

Additional arguments passed to the underlying QR routine.

Value

An object of class amDenseQR (or a wrapped sparse QR for adgCMatrix input) containing the factorisation components.

Examples

m <- adgeMatrix(matrix(rnorm(12), 4, 3))
qr_obj <- am_qr(m)
qr.R(qr_obj)
#> An amatrix dense matrix [cpu|policy=auto|precision=strict]
#> 3 x 3 Matrix of class "adgeMatrix"
#>          [,1]      [,2]      [,3]
#> [1,] 2.822338  1.369303 0.5724748
#> [2,] 0.000000 -1.791752 0.2272415
#> [3,] 0.000000  0.000000 0.6799935