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# Frantz Bouchereau

### MathWorks

Last seen: 16 days ago Active since 2017

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How to find the Zero Crossing Rate of a signal?
Signal Processing Toolbox in MATLAB R2021b ships a new zerocrossrate function that you can use to find zero crossing rates of a ...

2 months ago | 1

NUFFT vs FFT?
The advantage of nufft is that it allows you to compute the FFT of non-uniformly sampled signals. You cannot do this with fft. ...

4 months ago | 0

Calculate PSD using FFT
Here is a popular MATLAB doc page that explains the relationship between FFT and true power spectra: Power Spectral Density Esti...

4 months ago | 0

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how can i plot a power spectrum for my signal?
There are various ways in which you can compute and plot true power spectrum or power spectral density in MATLAB (when I say 'tr...

4 months ago | 0

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amplitude of (signal) after FFT operation?
There are various ways in which you can compute and plot true power spectrum or power spectral density in MATLAB (when I say 'tr...

4 months ago | 0

Scaling the FFT and the IFFT
Here is a popular MATLAB doc page that explains FFT scaling and the relationship between FFT and true power spectra: Power Spect...

4 months ago | 0

plotting the frequency spectrum
There are various ways in which you can compute and plot true power spectrum or power spectral density in MATLAB (when I say 'tr...

4 months ago | 0

How to plot frequency spectrum of a signal in matlab?
Your code computes FFT and needs some extra normalization steps to calculate true power spectrum. There are various ways in wh...

4 months ago | 1

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Units of spectrogram and pspectrum questions
spectrogram by default plots the magnitude of the power spectral density and hence the units at db/Hz. pspectrum computes and pl...

1 year ago | 0

How can I extract ST segment ,PR interval and QT interval from ECG signal?Plz help...
See this example where we use a deep network to segment QRS, P, and T waves from ECG waveforms. https://www.mathworks.com/help...

1 year ago | 0

IIR bandpass filter with very low corner frequencies
Emanuele, the passband frequencies are extremely small for the 860 Hz sample rate. I recomend you donwssmple the signal to a muc...

1 year ago | 0

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How do you reorder signals in the signal table (signal analyser app)
Hi Michael, we currently do not offer a way to reorder signals in the Signal Analyzer table. Thanks for sharing your use case. W...

1 year ago | 0

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Best data type for Signal Analyser
Hi Jamie, I would try to break the data into smaller vectors and use simple matrices to feed into Signal Analyzer. You can load ...

1 year ago | 0

Dealing with Large training datasets saved in a number of .mat files
Ruohao, You can use two signalDatastores - one to read your signal files and another one to read your labels. You can then comb...

1 year ago | 0

Labeling of a signal with Region of interests derrived from signal analyser/labelled
Hi Michael, you can use the Signal Labeler to do exactly what you describe. See the documentation here: https://www.mathworks.c...

2 years ago | 0

The chirp interface has changed in R2019b
Hi David. Chirp does not generate complex outputs, so the results of chirp are only correct when both frequencies are positive...

2 years ago | 0

How can I see all tabs in the Signal Analyzer app?
Hi Aleksander, You are using MATLAB R2016a and spectrum analysis was added to the Signal Analyzer app in R2016b. The spectrog...

4 years ago | 0