Main Content

step

System object: dsp.LDLFactor
Namespace: dsp

Decompose matrix into components

Syntax

Y = step(ldl,S)

Description

Note

Starting in R2016b, instead of using the step method to perform the operation defined by the System object™, you can call the object with arguments, as if it were a function. For example, y = step(obj,x) and y = obj(x) perform equivalent operations.

Y = step(ldl,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

obj specifies the System object on which to run this step method.

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.