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Visualize spectral kurtosis

`kgram = kurtogram(x)`

`kgram = kurtogram(x,sampx)`

`kgram = kurtogram(xt)`

`kgram = kurtogram(___,level)`

`[kgram,f,w,fc,wc,bw] = kurtogram(___)`

`kurtogram(___)`

`[`

returns the fast kurtogram along with a set of parameters you can use for follow-on
bandpass filter design and spectral kurtosis:`kgram`

,`f`

,`w`

,`fc`

,`wc`

,`bw`

] = kurtogram(___)

`f`

— Frequency vector for`kgram`

`w`

— Window size vector for`kgram`

`fc`

— Frequency where the maximal spectral kurtosis is located`wc`

— Window size where the maximal spectral kurtosis on the kurtogram is located`bw`

— Suggested bandwidth for the optimal bandpass filter

You can use this syntax with any of the input arguments in previous syntaxes.

`kurtogram(___)`

plots the kurtogram, along
with key critical optimization parameters, without returning any data. You can
use this syntax with any of the input arguments in previous syntaxes.

[1] Antoni, J., and R. B. Randall.
"Fast Computation of the Kurtogram for the Detection of Transient Faults." *
Mechanical Systems and Signal Processing *. Vol. 20, Issue 1, 2007, pp.
108–124.