These are objects of class
expand.qr.Matrix
They represent the QR decomposition of a matrix.
GENERATION:
This class of objects is returned from the
expand.qr.Matrix function
to represent a QR decomposition.
The following components must be included in a legitimate
"expand.qr.Matrix"
object:
VALUE:
q
The orthogonal factor.
r
The factor containing an upper triangular factor portion.
permutation
The column permutation applied to the original matrix in order to obtain the
factorization.