Specifications

The Concept of an LTI Array
5-5
Just as you might collect a set of two-by-two matrices in a multidimensional
array, you can collect this set offive transfer function models as a list in an LTI
array under one variable name, say,
sys. Each element of the LTI array is an
LTI model.
Individual models in the LTI array
sys are accessed via indexing. The general
form for the syntax you use to access data in an LTI array is
For example, you can access the third model in
sys with sys(:,:,3).The
following illustrates how you can use indexing to select models or their
components from
sys.
Figure 5-3: Using Indices to Select Models and Their Components
See “Indexing Into LTI Arrays” for more information on indexing.
sysa(Outputs,Inputs,Models)
The first index
selects the output
channels.
The second index
selects the input
channels.
The remaining indices select particular
models in the LTI array by their array
coordinates.
1.11
s 1.2+
-----------------
0
0
1
s 5.4+
-----------------
sysa(:,:,3) selects the third model in the array.
sysa(2,2,3) selects
the (2,2) entry of the
third model in the array.
1.09
s 1.4+
-----------------
0
0
1
s 5.8+
-----------------
1.15
s 1.3+
-----------------
0
0
1
s 5.6+
-----------------
1.11
s 1.2+
-----------------
0
0
1
s 5.4+
-----------------
1.3
s 1.1+
-----------------
0
0
1
s 5.2+
-----------------
1.1
s 1+
------------
0
0
1
s 5+
------------