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Mathieu NOE


Last seen: 2 giorni fa |  Attivo dal 2015

Followers: 11   Following: 0

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Engineer - mechanices /ekectronics / signal processing Average matlab user for 20 years now. Professional Interests: signal processing, adaptive control, noise and vibration processing

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Risposto
How can I make my scatter plot markers opaque, or semi transparent?
hello again a small demo to see the effect of the scatter function parameter 'MarkerFaceAlpha' on the dots transparency wit...

2 giorni fa | 0

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Plotting Polar Plots using time series data
hello again well, maybe I'm stupid but I coud not yet figure out how to use Perfect Polar Plots without having to spend some ...

3 giorni fa | 1

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how to filter data by rate of change?
hello I was thinking that I could use the "baseline" correction approach, then apply a scale factor on the baseline compensat...

3 giorni fa | 0

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How would you implement this reverb structure
FYI this is a code that implement 3 reverbs hope it helps infile='DirectGuitar.wav'; outfile='out_reverb.wav'; % read t...

3 giorni fa | 0

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Plot hatched bars with the hatched legends
hello is this the correct result you expect ? two simple corrections (wrong indexes) 1/ to get the correct bars hatched : ...

5 giorni fa | 0

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how can I link subplots (for brush data)?
tx to @NVSL for his contribution I can add these little upgrades to your code , like having only one call to readtable at each...

6 giorni fa | 0

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time lag where the phase of the signals is not consistent
maybe this ? Split the data in smaller chuncks and do the xcorr on it. you can choose the buffer size and overlap (as you woul...

6 giorni fa | 1

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Plot lines with curves from csv file
maybe this ? I'm surprised to be lucky on monday morning rounded corners appears now as red arcs of circle , but there's a bit...

6 giorni fa | 0

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Image Processing for ultrasound
let's try some stuff ok I am not an image processing expert , so use that or not ... filename = 'image_needle.jpg'; inp...

16 giorni fa | 0

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Reconstructing signal using the IFFT
hello try this (it works for images but also for any 2D numerical array) output = input with minimal error : max(abs(outpic...

16 giorni fa | 1

Risposto
Why there's opposite fit results phenomenon between the oddnomial and the evennmnial?
hello I suspect this is what you wanted to do (?) load('Ranking.mat') plot(RANKING,Total);grid on hold on order = 5; % 3...

16 giorni fa | 1

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spectrogram x-axis match with data
hello again so the problem was simply that you inverted time and frequency vectors when calling imagesc ! I guess the mistak...

16 giorni fa | 0

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Animating a 2-D Array as a function of time
not really sure to understand how it should look like , but maybe .... this ? ppdtrace = 0.75+0.5*rand(1200,8); figure(1) ...

17 giorni fa | 0

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Risposto
unable to iterate serially through files in a for loop
hello @shedrach try this as simple approach where I first look at the xls files and create a 2D array that contains month and...

17 giorni fa | 0

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Issue with dispaly of 3D images created from multiple 2D slices
For a 3D rendering (like MRI) I suggest you try this : vol3d v2 - File Exchange - MATLAB Central %% create a 3D rendering o...

18 giorni fa | 0

Risposto
spectrogram x-axis match with data
this can also helps you : %%Method 1: equate axis sizes for all axes after adding colorbar % Size of axes without a colorbar ...

18 giorni fa | 0

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How to apply a threshold to gevfit?
hello you can already have a better fit without the threshold and use it only to truncate the fitted curve (but I agree it's...

19 giorni fa | 0

Risposto
Slice Displaying Grids Instead of Color
hello again there was just one mistake : slice(x,y,z,ta,[],[],1:4); to be replaced with : slice(x,y,z,ta,[],[],kz(1:4)); beca...

20 giorni fa | 0

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Risposto
Function 'boundary' not supported for code generation. How to solve this?
hello based on code seen here : https://fr.mathworks.com/matlabcentral/answers/299796-tight-boundary-around-a-set-of-points ...

20 giorni fa | 0

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how do I implement a real time FFT in simulink?
hello why not simply use a counter to do the job ? (as we deal with a sinusoidal wave) you need one counter for the frequen...

23 giorni fa | 0

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How to calculate only several frequency with FFT ?
hello try this DFT on a specified frequency - File Exchange - MATLAB Central

23 giorni fa | 1

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I want to use a low-pass filter to cut off frequencies above the cutoff frequency.
hello I notice that the cutoff freq is very low compared to fs , so maybe lowpass has a numerical problem when the normalized ...

23 giorni fa | 0

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Average Curvature of a Closed 3D Surface
that's me again ! :) so a bit for my own fun , I tried a few things here I decided I wanted to define the intersection of yo...

circa un mese fa | 1

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Confine contour lines to region defined by data
hello sorry for not putting alot of comments, but I am in a hurry.... here 's my first suggestion, maybe a little dirty but ...

circa un mese fa | 0

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Fit countours to shape
arrgh - I don't have time to finish my work - it's getting very late here ... and I am not an expert in image processing also ...

circa 2 mesi fa | 0

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why envelope by hilbert increasing in tail of signal?
hello again here 3 suggestions appart from the traditionnal hilbert transform see the 2 functions in attachment t = 0:0.0...

circa 2 mesi fa | 0

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fittting data using nonlinear optimization fminsearch
hello seems to me the data looks like a traditionnal exp decaying pulse - I don't undertsand how you can have the 1/t² ampli...

circa 2 mesi fa | 0

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how to plot graph as file attached.
hello you can read your header file with any matlab function that read ascii / txt files . Here I opted for readlines . Still ...

2 mesi fa | 0

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Frequency Response Function and FFT for Modal Analysis
hello yes I a coming very late in the show but maybe there is still a need for a better code you can improve the FRF estimat...

2 mesi fa | 0

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How to find distance in a for loop using d=distance
hello the loop must stop one index value before the end also I would suggest you index the d value so you get (numel(TrackLa...

2 mesi fa | 1

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