Description Usage Arguments Details Value Constraints Examples
The LU decomposition involves factorizing a matrix as the product of a lower triangular matrix L and an upper triangular matrix U. Permutation matrix is also provided in the output. If permutation matrix is not used in the decomposition, the output of permutation matrix is an identity matrix.
1 |
object |
is of class FLMatrix |
... |
any additional arguments |
lu
replicates the equivalent lu() generic function.
expand
decomposes the compact form to a list of matrix factors.
The expand method returns L,U and P factors as a list of FLMatrices.
The decomposition is of the form A = P L U where typically all matrices are of size (n x n), and the matrix P is a permutation matrix, L is lower triangular and U is upper triangular.
x |
the FLVector form of "L" (unit lower triangular) and "U" (upper triangular) factors of the original matrix |
perm |
FLVector that describes the permutation applied to the rows of the original matrix |
Dim |
FLVector that gives the dimension of the original matrix |
lower |
FLMatrix representing the lower triangular matrix |
upper |
FLMatrix representing the upper triangular matrix |
data_perm |
FLMatrix representing the permutation matrix |
Input can only be with maximum dimension limitations of (1000 x 1000).
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