filtstates (Signal Processing Toolbox)

Filter states

Syntax

Hs = filtstates.structure(input1,...)

Description

Hs = filtstates.structure(input1,...) returns a filter states object Hs, which contains the filter states.

You can extract a filtstates object from the states property of an object with

```
Hd = dfilt.df1
Hs = Hd.states
```

or, for an mfilt object in the Filter Design Toolbox, with

```
Hm = mfilt.cicdecim
Hs = Hm.states
```

Structures

Structures for filtstates specify the type of filter structure. Available types of structures for filtstates are shown below.

filtstates.structure
Description

filtstates.dfiir
filtstates for IIR Direct-form I filters (dfilt.df1, dfilt.df1t, dfilt.df1sos, and dfilt.df1tsos)

filtstates.cic
filtstates for cascaded integrator comb filters. (Available only with the Filter Design Toolbox and the Fixed Point Toolbox.)

filtstates.structure	Description
`filtstates.dfiir`	filtstates for IIR Direct-form I filters (`dfilt.df1`, `dfilt.df1t`, `dfilt.df1sos`, and `dfilt.df1tsos`)
`filtstates.cic`	filtstates for cascaded integrator comb filters. (Available only with the Filter Design Toolbox and the Fixed Point Toolbox.)

Methods

Refer to the particular filtstates.structure reference page for information on methods.

filtic filtstates.dfiir