User`s guide

Representing Time- and Frequency-Domain Data Using iddata Objects
Modifying Time and Frequency Vectors
The id dat a object stores time-domain data o r frequency-domain data and has
several properties that specifythetimeorfrequency values. T o modify the
time or frequency values, you must change the corresponding property values.
Note You can modify the property SamplingIn stants by setting it to a
new vector with the length equal to the number of data samples. For more
information, see “Constructing an iddata Object for Time-Domain Data” on
page 1-48.
The following tables summarize time-vector and frequency-vector properties,
respectively, and provides usage examples. In each example,
data is an
iddata object.
Note Property names are not case sensitive. You do not need to type the
entire property name if the first few letters uniquely identify the property.
iddata Time-Vector Properties
Property
Description
Syntax Example
Ts
Sampling time interval.
• For a single
experiment,
Ts is a
scalar value.
• For multiexperiement
data with
Ne
experiments, Ts is
a
1-by-Ne cell array,
and each cell contains
the sampling interval
of the co rresponding
experiment.
To set the sampling
interval to
0.05:
set(data,'ts',0.05)
or
data.ts = 0.05
1-59