lu

lu(obj, [permute=false])

obj is a matrix with no NULL values.

permute is a Boolean value. The default value is false.

Compute pivoted LU decomposition of a matrix.

If permute is false, return 3 matrices (L, U and P) with obj = P'LU. P is a permutation matrix, L is a lower triangular matrix with unit diagonal elements, and U is an upper triangular matrix.

If permute is true, return 2 matrices (L and U) with obj = L*U.

A = matrix([[2, 5, 8, 7], [5, 2, 2, 8], [7, 5, 6, 6], [5, 4, 4, 8]]);

P, L, U = lu(A);
P;

L;

U;

L, U = lu(A, true);
L;

U;