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# Frantz Bouchereau

### MathWorks

Last seen: 17 Tage ago Active since 2017

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Answered
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. ...

etwa 2 Monate ago | 0

Answered
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...

etwa 2 Monate ago | 0

| accepted

Answered
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...

etwa 2 Monate ago | 0

| accepted

Answered
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...

etwa 2 Monate ago | 0

Answered
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...

etwa 2 Monate ago | 0

Answered
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...

etwa 2 Monate ago | 0

Answered
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...

etwa 2 Monate ago | 1

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Answered
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...

etwa ein Jahr ago | 0

Answered
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...

etwa ein Jahr ago | 0

Answered
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...

etwa ein Jahr ago | 0

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Answered
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...

etwa ein Jahr ago | 0

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Answered
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 ...

etwa ein Jahr ago | 0

Answered
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...

etwa ein Jahr ago | 0

Answered
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...

mehr als ein Jahr ago | 0

Answered
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...

fast 2 Jahre ago | 0

Answered
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...

mehr als 4 Jahre ago | 0

Answered
Rotary spectra for velocity time series
Hi Javier, Please take a look at the Signal Processing toolbox rmpordermap function. It computes a pectrogram of order vs. tim...

mehr als 4 Jahre ago | 0

Answered
I am trying to plot a signal and use a scrollbar on the x-axis to view several hours worth of data
Hi Nicholas, have you tried the Signal Analyzer app? It allows you to visualize long signals and pan through them in the time an...

mehr als 4 Jahre ago | 0