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John Navarro

Last seen: 12 months ago Active since 2020

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MathWorks EDG Programming Challenge (ENG) access
Hello. I am applying for a position at Mathworks but I can not access the Programming Challenge which is a part of the applicati...

1 year ago | 1 answer | 0

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Difference between Shannon entropy and shannon entropy from wavelet packet?
I would guess it is because the first equation is evaluating the Shannon entropy of the signal as a series, while the second is ...

2 years ago | 0

Question

Identification of fundamental frequency and not harmonics in a FFT - using peak locations
Hello I would like to generate my results as similar as I can to the images in red at Figure 6 | Feature extraction of milling ...

2 years ago | 1 answer | 0

1

Animate 3D Plot View
Great answer, but... Does someone know if it is an updated solution or a easier command for this problem? The accepted solution...

2 years ago | 0

Question

How to get the FFT peaks from a non stationary signal
Hello I have a signal of 15 seconds with a sampling rate of 20KHz. I need a table with the location of the 3 highest peaks of t...

2 years ago | 1 answer | 0

1

Question

Time resolution of Spectral Entropy - How could I modify it?
Hello everyone, I have a signal (a timetable of 307,200 data points) with sampling rate of 20480 Hz (0.00005s) and total length...

2 years ago | 1 answer | 0

1

How to implement PCA to differentiate the signals from each other.
By PCA did you mean Principal component analysis? If so, PCA does not extract features, it evaluates their correlation and indi...

2 years ago | 0

Is it possible to join tables with different variables and sizes by filling/padding the missing variables and rows with NaN or similar?
C = outerjoin(A,B,'Keys',{'Common Variable'},'MergeKeys',true) % Where A and B are the corresponding Tables to merge. Then you...

3 years ago | 1

Question

Research program support MathWorks
Hello. I will like to know more about this program of MathWorks to get more support with my PhD project, but I cant find any in...

3 years ago | 3 answers | 0