dsp.LDLFactor
(Removed) Factor square Hermitian positive definite matrices into components
dsp.LDLFactor
has been removed. Use ldl
instead. For more information, see Compatibility Considerations.
Description
The LDLFactor
object factors square Hermitian
positive definite matrices into lower, upper, and diagonal components. The object uses
only the lower triangle of S.
To factor these matrices into lower, upper, and diagonal components:
Define and set up your LDL factor object. See Construction.
Call
step
to factor the matrices according to the properties ofdsp.LDLFactor
. The behavior ofstep
is specific to each object in the toolbox.
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.
Construction
ldl = dsp.LDLFactor
returns an LDL factor System object, ldl
, that computes unit lower
triangular L
and diagonal D
such that S
= LDL for square,
symmetric/Hermitian, positive definite input matrix S
.
ldl = dsp.LDLFactor('
returns an PropertyName
',PropertyValue
,...)LDL
factor System object, ldl
, with each specified property set
to the specified value.
Properties
Methods
step | Decompose matrix into components |
Common to All System Objects | |
---|---|
release | Allow System object property value changes |
Examples
Algorithms
This object implements the algorithm, inputs, and outputs described on the LDL Factorization block reference page. The object properties correspond to the block parameters, except:
No object property that corresponds to the Non-positive definite input block parameter. The object does not issue any alerts for nonpositive definite inputs. The output is not a valid factorization. A partial factorization is in the upper left corner of the output. |