User`s guide

1 Data Processing
iddata Frequency-Vector Properties
Property
Description
Syntax Example
Frequency
Frequency values at
which the Fourier
transforms of the signals
are defined.
• For a single
experiment,
Frequency
is a scalar value.
• For m ultiex pe riement
data with
Ne
experiments,
Frequency is a
1-by-Ne cell array,
and each cell contains
the frequencies of
the corresponding
experiment.
To specify
100 frequency
values in l og space,
ranging between
0.1 and
100,usethefollowing
syntax:
data.freq =
logspace(-1,2,100)
Units
Frequency unit must
have the following values:
• If the
TimeUnit is
empty or
s (seconds),
enter
rad/s or Hz
• If the TimeUnit is a ny
string unit (other than
s), enter rad/unit.
For multiex pe riement
data with
Ne experiments,
Units is a 1-by-Ne cell
array, and each cell
contains the frequency
unit for each experiment.
If you specified the
TimeUnit as msec,your
frequency units must be:
data.unit=
'rad/msec'
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