lugetU(A)

Returns matrix U of the LU factorization of matrix A. U is an upper triangular matrix such that A = P*L*U. Matrix P is a permutation matrix in case row exchanges were performed.


See also lugetL lugetP cholesky 


Example


A = ( 1, 0, 4 ; 3, 2, 1 ; 3, -2, 1 )

1  0  4

3  2  1

3 -2  1

U = lugetU(A)

1  0   4

0  2  -11

0  0  -22