Specifications

5 Arrays of LTI Models
5-20
Indexing Into LTI Arrays
You can index into LTI arrays in much the same way as you would for
multidimensional arrays to:
•Access models
•Extract subsystems
•Reassign parts of an LTI array
•Delete parts of an LTI array
When you index into an LTI array
sys, the indices should be organized
according to the following format
where
•
Outputs are indices that select output channels.
•
Inputs are indices that select input channels.
• are indices into the array dimensions that select one model or a
subset of models in the LTI array.
Note on Indexing into LTI Arrays of FRD models: For FRD models, the
array indices can be followed by the keyword
'frequency' and some
expression selecting a subset of the frequency points as in
sys (outputs, inputs, n1,...,nk, 'frequency', SelectedFreqs)
See “Referencing FRD Models Through Frequencies” on page 3-7 for details on
frequency point selection in FRD models.
Accessing Particular Models in an LTI Array
To access any given model in an LTI array:
•Use colonarguments (
:,:) for the first two indices to select all I/O channels.
sys(Outputs, Inputs, )n
1
… n
K
,,
n
1
… n
K
,,