Transform Data

Transform data between time and frequency domains

Functions

`fft`	Fast Fourier transform (FFT) of `iddata` object
`ifft`	Transform iddata objects from frequency to time domain
`etfe`	Estimate empirical transfer functions and periodograms
`spa`	Estimate frequency response with fixed frequency resolution using spectral analysis
`spafdr`	Estimate frequency response and spectrum using spectral analysis with frequency-dependent resolution

Examples and How To

Transform Time-Domain Data in the App
Transform time-domain data to frequency-domain or frequency-response data.
Transform Frequency-Domain Data in the App
Transform frequency-domain input-output data to time-domain or frequency-response data.
Transform Frequency-Response Data in the App
Transform frequency-response data to frequency-domain input-output data or to frequency-response data with a different frequency resolution.

Concepts

Supported Data Transformations
Transform between time-domain and frequency-domain data at the command line.
Transform Between Time-Domain and Frequency-Domain Data
Transform between time-domain and frequency-domain iddata objects at the command line.
Transforming Between Frequency-Domain and Frequency-Response Data
Transform between iddata and idfrd objects at the command line.