MatrixLUBkSub

MatrixLUBkSub matrtixL, matrixU, index, vectorB

MatrixLUBkSub provides back substitution for LU decomposition.

Details

This operation is used to solve the matrix equation Ax=b after you have performed LU decomposition (see MatrixLUD). Feed this routine M_Lower,M_Upper and W_LUPermutation from MatrixLUD along with your right-hand-side vector b. The solution vector x is returned as M_x. The array b can be a matrix containing a number of b vectors and the M_x will contain a corresponding set of solution vectors.

Generates an error if the dimensions of the input matrices are not appropriate.

See Also

Matrix Math Operations for more about Igor's matrix routines.