User`s guide

Transforming Between Time- and Frequency-Do main Data
Transforming Between Time- and Frequency-Dom ain Data
In this section...
“Transforming Data Domain in the GUI” on page 1-119
“Transforming Data Domain a t the Command Line” on page 1-126
Transforming Data Domain in the GUI
• “Transforming Time-Domain Data” on page 1-119
• “Transforming Frequency-Domain Data” on page 1-123
• “Transforming Frequency-Re sponse Data” on page 1-124
• “See Also” on page 1-126
Transforming Time-Domain Data
In the S ystem Identification Tool GUI, time-domain data h a s an icon with a
white background. You can transform time-domain data to frequency-domain
or frequency-response data. The frequency values of the resulting frequency
vector range from
0 to the Nyquist frequency
f
S
Ts
=
π
,whereT
s
is the
sampling interval.
Transforming from time-dom ain to frequency-response data is equivalent to
estimating a model from the data using the
spafdr method.
1-119