Y = step(H,S)
Y = step(H,S) decomposes the matrix S into lower, upper, and diagonal components. The output Y is a composite matrix with the L as its lower triangular part and D as the diagonal and L'as its upper triangular part. If S is not positive definite the output Y is not a valid factorization.
Note: The object performs an initialization the first time the step method is executed. This initialization locks nontunable properties and input specifications, such as dimensions, complexity, and data type of the input data. If you change a nontunable property or an input specification, the System object™ issues an error. To change nontunable properties or inputs, you must first call the release method to unlock the object.