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Analyze Data

Determine data characteristics such as delay, feedback, and excitation level

Functions

bode Bode plot of frequency response, magnitude and phase of frequency response
bodemag Bode magnitude response of LTI models
plot Plot input-output data
advice Analysis and recommendations for data or estimated linear models
delayest Estimate time delay (dead time) from data
isreal Determine whether model parameters or data values are real
realdata Determine whether iddata is based on real-valued signals
feedback Identify possible feedback data
pexcit Level of excitation of input signals
impulseest Nonparameteric impulse response estimation
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
iddataplotOptions Options set for iddata/plot

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