These are objects of class
qr.Matrix
They represent the QR decomposition of a matrix.
GENERATION:
This class of objects is returned from the
qr.Matrix function
to represent a QR decomposition.
The
"qr.Matrix" class of objects has methods for the following generic
functions:
det
,
expand ,
facmul ,
rcond ,
solve
The following component must be included in a legitimate
"qr.Matrix" object:
VALUE:
factors
a list composed of two unnamed components. The first element of this list
is a matrix which has the R factor of the QR decomposition in its upper
triangle and information on the transformations whose product make up the
orthogonal Q factor in its lower triangle. The second element of the list is
a vector of auxiliary information needed to apply or reconstruct the
orthogonal or Q factor of the QR decomposition.
The following component may also be included in a
"qr.Matrix" object:
pivot
if pivoting is requested, this is the column permutation applied to the
original matrix to achieve the QR decomposition.