Referencing Channels by Name :: Operations on LTI Models (Creating and Manipulating Models)

Creating and Manipulating Models

Referencing Channels by Name

You can also extract subsystems using I/O group or channel names. For example, if sys has an input group named noise, consisting of channels two, four, and five, then

```
sys(1,'noise')
```

is equivalent to

```
sys(1,[2 4 5])
```

Similarly, if pressure is the name assigned to an output channel of the LTI model sys, then

```
sys('pressure',1) = tf(1, [1 1])
```

reassigns the subsystem from the first input of sys to the output labeled pressure.

You can reference a set of channels by input or output name by using a cell array of strings for the names. For example, if sys has one output channel named pressure and one named temperature, then these two output channels can be referenced using

```
sys({'pressure','temperature'})
```

Referencing FRD Models Through Frequencies Resizing LTI Systems