expand {Matrix} | R Documentation |
Expands decompositions stored in compact form into factors.
expand(x, ...)
x |
a matrix decomposition. |
... |
further arguments passed to or from other methods. |
This is a generic function with special methods for different types
of decompositions, see showMethods(expand)
to list them
all.
The expanded decomposition, typically a list of matrix factors.
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))
(ex <- expand(lux <- lu(x)))