System object: dsp.LDLFactor
Package: dsp
Decompose matrix into components
Y = step(ldl,S)
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.