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Mathieu NOE


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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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Respondida
Data must be a single matrix Y or a list of pairs X,Y
hello maybe this ? I prefer to avoid using i and j as loop indexes as those letters usually are reserved as the iamginary un...

alrededor de 17 horas hace | 0

Respondida
Overfitting of computational model in experimental data
hello fminsearch can be quite sensitive to IC, so even a slightly sub optimal IC value can lead to lack of performance / robus...

alrededor de 19 horas hace | 0

Respondida
Read values from fvtool graph
hello I am not sure you can retrieve the data (mag,phase) from fvtool object , but you can use freqz instead now both code b...

3 días hace | 0

Respondida
islocalmax2: problems understanding 'MinProminence'
hello just fyi I tried with this fex submission (and no smoothing ) peaks2 - find peaks in 2D data without additional toolbox...

6 días hace | 0

Respondida
How to make a curve fill the whole plotspace
hello try this : have log spaced x vector (with power of 10 limits) should do the job (fastest fix) and 500 to 1000 points ...

7 días hace | 0

Respondida
extract data from a 3D matrix using a window
hello there is one Q array per startInd value so either you use Q in a for loop without indexing (if you can tolerate to overw...

9 días hace | 0

Respondida
I want to connect the ends of the white contour in the image to form a complete circle, eliminating the gaps.
hello sorry , this is a "no image processing" code - it may or may not correspond to your needs , but it does the job ! hop...

10 días hace | 0

Respondida
How to keep one signal fixed in dynamic time warping (dtw)?
hello in case that may answer the question this is a home made buffered xcorr approach hope it helps ! clc clearvars s...

14 días hace | 0

Respondida
Make calculation on line profile (Intensity) through object on image
hello Jason hope you are doing well see my suggestion below hope it helps ! % load data y = readmatrix('LineProfile')...

17 días hace | 0

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Respondida
Audio data loading and splitting
hello see example below - adapt to you own needs %% Important Notice : % NB : wav files are not searched inside the main f...

22 días hace | 0

Respondida
Max velocity on 1/3 octave band from Acceleration-Time data
hello again so I decided to make already some modifications in your code , and test it with synthetic data (at least you know ...

25 días hace | 2

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Respondida
How to plot the magnitude and phase of this Fourier Transform frequency response
hello well the code seems to work and the model plot (in red) looks good / in match with your publication maybe the K -ga...

alrededor de 1 mes hace | 0

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Respondida
How can I accurately get the fringes of this profile.
hello this is a very simple (simplistic ?) approach I used peakseek for faster execution vs findpeaks but you can use your o...

alrededor de 1 mes hace | 0

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Respondida
How to calculate radiuses of an airfoil from its coordinates?
hello find below a demo code that computes neutral line and curvature / radiuses of airfoil . there is also a code section tha...

alrededor de 1 mes hace | 1

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Respondida
Scattered 3d data to contourf plot
hello first alternative is : % create somme dummy data N = 20; z = peaks(N); % convert to scatter points z = z(:); x ...

alrededor de 1 mes hace | 0

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Issues plotting R,theta, T from X,Y,Z data
hello when plotting the X,Y,Z data you get a cylinder or something like a cylinder with elliptical shape I removed the X di...

alrededor de 1 mes hace | 0

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Respondida
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...

alrededor de 2 meses hace | 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 ...

alrededor de 2 meses hace | 1

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Respondida
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...

alrededor de 2 meses hace | 0

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Respondida
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...

alrededor de 2 meses hace | 0

Respondida
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 : ...

alrededor de 2 meses hace | 0

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Respondida
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...

alrededor de 2 meses hace | 0

Respondida
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...

alrededor de 2 meses hace | 1

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Respondida
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...

alrededor de 2 meses hace | 0

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Respondida
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...

2 meses hace | 0

Respondida
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...

2 meses hace | 1

Respondida
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...

2 meses hace | 1

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Respondida
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...

2 meses hace | 0

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Respondida
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) ...

2 meses hace | 0

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Respondida
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...

2 meses hace | 0

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