# Mathieu NOE

Last seen: 2일 전 2015년부터 활동

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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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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 ...

6일 전 | 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...

10일 전 | 1

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Error: unrecognized function or variable "bi2de"
Thanks to this post it was easy to (re)create the missing / unknown bi2de function (see end of the code) : Most efficient way to...

11일 전 | 0

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comment afficher une image à un endroit spécifié d'un axe ?
hello Daniel you need to freeze your axes , otherwise you will not get the desired results here I simply used "hold on" after...

12일 전 | 0

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Converting cell array with <missing> elements to numerical or double matrix

16일 전 | 0

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Is there a way to crop an array depending on the values that I want through a function as the values change?
hello try this : a = [0 0 0 0 1 1 1 1 1 0 0 0 1 0 0 0 0 1 1 1 1 1 0 1 1 1 1]; ind = logical(a); [begin,ends] = find_st...

대략 2개월 전 | 0

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Slicing arrays and save it in the file

대략 2개월 전 | 1

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Script has no errors, but no plot is given
again... let's fix it I cannot check here if e^(r(i)^2) (probably wrong) must be replaced by exp(r(i)^2) - I let you double ...

대략 2개월 전 | 0

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Use of eig(A) for eigenvectors
hello let's fix it 1/ had to remove the trailing end - there's simply no reason to have an "end" at the end of your code - p...

대략 2개월 전 | 0

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The blank before var >0.5 cause error in R2016a
I don't think it has to do with a specific release I have the same result with R2020a now either you put no space or at least...

2개월 전 | 1

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Remove harmonics background noise
I have some doubts we can recover a clean sinewave from that ... nevertheless I tried a few things ... first I decimated the sig...

2개월 전 | 0

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Hi I have Csv file for voltage and time data and I would like to compute spectrogram to to compute harmonics at different frequencies but my spectrogram looks so much noisy or
hello you may play with the colormap and also with the displayed dB range to focus on your signal tones and not the background...

2개월 전 | 0

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Plotting path of rods on a circular disk along a surface to deduce rack gear profile.
ok, I had some fun today with your exercise ... time to grind a bit the sharp edges though ! % a disk fitted with 4 rods d = ...

2개월 전 | 1

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Plotting while skipping the middle point in a vector
hello if you can avoid update the plot inside the for loop here I store your data in xx and yy arrays and after the for loop...

2개월 전 | 1

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Rows interpolation in a matrix
hello you can use fillmissing for this task data = readmatrix("data.txt"); data(abs(data)<eps) = NaN; data_out = fillmiss...

2개월 전 | 2

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How to call a own function in other mfile?
hello you simply need to have your function(s) located at the end of your script (mfile) % example code %% main code x =...

2개월 전 | 0

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How do I reorder a regression plot in the desired sequence?
hello again you could do that NB that the cos^2 is not what I used A simple sin (or cos if you prefer works better - your ...

2개월 전 | 0

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How to merge and smooth multiple curves in a plot, if there are discrete points?
hello tried afew options, probably here my best result in the very limited time I have now : this is a demo on the first two...

2개월 전 | 0

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Plot 3D surface within nonlinear bounds
hello this is a job for inpolygon Points located inside or on edge of polygonal region - MATLAB inpolygon - MathWorks France...

2개월 전 | 1

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calulate the indicated mean pressure with a p-v diagramm
hello Julian yes you can use polyarea, I believe you could also with trapz like in my example below (it uses this Fex submissi...

2개월 전 | 0

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I have a function that adds a legend I want to make the legend group certain plots together yet so that instead of a legend with 14 entries there is a legend with 5 entries
this is a simple solution, where the files are processed in the order that you wished (cf list = [1 3 5 2 4 6 7 9 11 8 10 12 13 ...

2개월 전 | 0

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Obtain Transfer Function for Bode Plot data from PLECS Software
hello If you have the signal processing toolbox, you can use invfreqs or invfreqz to identify a transfer function here I use...

2개월 전 | 0

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Phase retrieval of a periodic signal, not working well
here a better solution without the need for fft you should not use the first peak in your code , as it does not correspond to ...

3개월 전 | 0

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StartPoint on Curve Fitting Toolbox
hello here a very simple code with a 2 steps approach - a relatively accurate initial guess of Aand Q, then refined with fmin...

3개월 전 | 1

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FFT plotting trouble: Concatenated inputs
hello when you do modal analysis / FRF measurements with a hammer , you should split the record into individual hit input and ...

3개월 전 | 0

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interpolation of a sinusoidal tunnel data
hello again so I looked a bit some of your data , and my first question would be , why not first plot your (scattered) data wit...

3개월 전 | 0

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Frequency response of a system operating at a fixed frequency
hello we could use the general fft approach , but you could also use the stepped sine identification method. We only need to g...

3개월 전 | 1

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create a 3D smoothing with csaps (or similar)
hello again ! as your post title is about smoothing, this is what I propose , based on the fex submission : smoothn - File E...

3개월 전 | 0

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3D plot matrices
hello maybe this ? M100 = [19.8 29.305 38.425 48.37; 4.9 7.4 10.0 13.65]; M300 = [19.35 31.25 40.05 50.55; 7.6 12.65 16.65 ...

3개월 전 | 0

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Calculating Surface Curvature from Image Data
hello I think this is because your K array contains some high amplitude spikes that avoid you see the smaller amplitude signal...

3개월 전 | 1

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