Mathieu NOE

Last seen: 3 jours il y a | Actif depuis 2015

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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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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 ...

2 jours il y a | 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...

6 jours il y a | 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...

10 jours il y a | 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 ...

11 jours il y a | 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...

12 jours il y a | 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...

15 jours il y a | 1

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I have created a depth map using a time of flight sensor by measuring the distances to create a depth map I am not sure if it is correct.
hello the code seems correct but the look of the 3D plot seems 'maybe) questionnable . I had a feeling that the Z values belo...

17 jours il y a | 0

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How can I obtain accurate and high-quality FRF results?
hello again I made very few changes to the code - I think that you cannot get any better results if you use only one hit data....

27 jours il y a | 1

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Put arrow and its value in a plot
hello this is a simple example , based on the fex submission : arrow - File Exchange - MATLAB Central load('data_ask_MLD'...

29 jours il y a | 0

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LQI controller is weirdly slow in response and doesn't always reach a goal on plant
hello again used a simplified version of your model and applied simple PID control (easier for real time conversion) : % Def...

environ un mois il y a | 1

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rms of noise signal
hello to get the correct result, you need two uncorrelated random generators. here you are using the same seed , so the two ou...

environ un mois il y a | 0

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Sinewave with log frequency - Shows the wrong frequency content
hello you have to compute the angle increment vs time then take the sine of that angle (or, in other words, do the integral of...

environ 2 mois il y a | 0

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improve fit compared to R
hello I interpreted your question as how to fit a U shaped function to your data , so at the end I opted for a parabola , is t...

2 mois il y a | 0

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Sampling time of matlab figure data
hello to retrieve data from a figure , you can do it by two ways : for recent releases : openfig('data points.fig'); set(...

3 mois il y a | 0

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Interpolate pairs of values from matrix
hello you can surely get the required x , y data for a given z value ; use contour for that purpose as shown in code example b...

3 mois il y a | 0

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how to extract (x) coordinates and (y) coordinates of the top boundary from bwimage
hello this is a solution that does not even require the Image processing toolbox of course I had to do a bit of gym to conver...

3 mois il y a | 0

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Trouble in reading .tdms file
hello No toolbox required here - I simply used this Fex submission (files are attached if you prefer the fast way) ConvertTD...

3 mois il y a | 0

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Plot Fourier Transform (FFT) Interpolation Model into future
hello Giacomo first I corrected some minor bugs (before we dig into more technical stuff) A is an amplitude so you should t...

3 mois il y a | 0

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Colormap generated using the information of different arrays
hello Richard again you were pretty close to the solution , but to actually make the transparency work you should replace this...

3 mois il y a | 1

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comment savoir si un dossier est vide
hello The dir structure will return only the two directories entries '.' and '..'. So, check length(d)==2, if that is the cas...

3 mois il y a | 0

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Moving window percentile computation using Conv
hello maybe this ? NB it does not need conv but requires Statistics and Machine Learning Toolbox % dummy data t= 0:0.25:100;...

3 mois il y a | 0

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Why does the signal become thicker after noise reduction and the dots on both sides diverge?
hello again you can already get decent results with smoothdata , other smoothing techniques based on splines or NN could also ...

3 mois il y a | 0

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extracting overlapping portions of 2 similar tracks
hello you could do something like this ... I have manually checked which track is the longest and the code works here because ...

3 mois il y a | 0

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Matlab code to find the Wave height
hello again I am by no means an image processing expert, but sometimes I go outside my comfort zone ... hopefully my suggestion...

3 mois il y a | 0

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how to separate the real and imaginary parts inside a cell
Maybe this ? % create dummy data n = 32; for k = 1:2 cellarray{k} = k*ones(n,n)*(1+1i*5); end % process it for ...

3 mois il y a | 0

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Change format of field contour labels that have been manually added in a tiled layout
why not create explicitely the levels (V array) ? a = 0.98; b = 1.02; Z = peaks(99)/100 + (a+b)/2 ; XY = [-0.375:.125:.37...

3 mois il y a | 0

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How to find center and radius of an arc from binarized image
hello this is what I can offer you today you will need the attached function (CircleFitByTaubin.m) , and this Fex submissio...

3 mois il y a | 0

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How do i show the "delta" difference between the two plotted curves?
hello you need to "realign" your two data sets vs common x vector - in other words we need to creat a new x vector and inter...

3 mois il y a | 0

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Extraction of the spatial coordinates of a curve and calculation of the normal line to each of its points
hello tried a few things here As far as I have understood correctly your question, the points you are looking for are given ...

4 mois il y a | 1

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Put to white the plot space outside a geometric shape
hello have you checked that the colorbar is symetric around zero (to have white color correspind to zero exactly ? ) this re...

4 mois il y a | 1

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Mathieu NOE

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