Mathieu NOE
Hutchinson
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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Answer 10 questions that were unanswered for more than 30 days
Awarded to Mathieu NOE on 08 Jul 2021
Contribute at least one answer each month for 6 consecutive months
Awarded to Mathieu NOE on 02 Apr 2021
Accept 1 answer given by other contributors
Awarded to Mathieu NOE on 18 Mar 2021
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Awarded to Mathieu NOE on 17 Dec 2020
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Content Feed
How to move line plot to be above a stacked bar chart?
hello this would be my 2 cents suggestion using ylim : code : indexValues = [repelem(6, 33), repelem(5,6), repelem(4,6),...
ongeveer 8 uur ago | 0
Index in position 2 exceeds array bounds (must not exceed 2)
hello just fixed minor issues on following two lines %%%SHOW ITERATION INFORMATION disp(['Iteration : ' num2str(it...
ongeveer 9 uur ago | 0
How to change the color of my plots
hello I modified a bit your code to get this result : .code : close all clear all avalues=0.3:0.005:1; N=200; d=0.03...
ongeveer 9 uur ago | 0
How to generate a sequence of acoustic levels (dB) of a particular frequency (let say 50 Hz) of an acoustic signal?
hello seems your looking for a tool doing spectral analysis check this : clc clearvars %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%...
3 dagen ago | 0
I have created a function that relies on a guess, and now I need to create a for loop for that function that plugs in the answer it gives back in to the "OLD" original guess.
hello yes , your "recursion" is not really working this works Once you're satisfied with the code , you can reùove / comme...
4 dagen ago | 0
How to choose stopband ripple and passband ripple of filter for High pass filter
hello why not start with simpler filters like butterworth or bessel filters ? . If you don't have any specific requirement ...
4 dagen ago | 1
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How can I handle the signal of the data read from the serial port
hello if you are able to store the data in a file (txt or mat or ..) you can adapt this code I developped for audio processing...
4 dagen ago | 1
How to add low frequency noise to the signal?
hello this is a simple demo showing a sine signal corrupted by a low frequency noise . You can adjust the parameters to your o...
4 dagen ago | 0
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Reading multiple non-sequential *.txt files containing both text and numbers
hello this is an example that shows how I could read one then multiple text files (and applying a natural name sorting) you ...
5 dagen ago | 0
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pulse train with gaussian pulses in an irregular interval
hello a quick and dirty demo , not using gauspuls but that could be easily done also clc clearvars f0 = 50; % pulse freq...
5 dagen ago | 0
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Time Series Partitioning of EMG data
hello see example below : samples = 40000; buffer = 2000; data = rand(samples,1)+10*((1:samples)/samples)'; % noisy ramp...
5 dagen ago | 0
how can I know the sence of voice that was recorded in a special place?
hello I interpret your request about how to analyse your records - assuming you can use audioread from matlab , here 's a cod...
5 dagen ago | 0
How to save multiple output?
hello I would recommend to use structures (indexed) like in this example a =randperm(18); b=reshape(a,9,2); vals=b; [m,n...
5 dagen ago | 1
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use regexp to extract index
hello my 2 cents suggestion using readlines and working on strings : this simple code can be expanded / modified according t...
7 dagen ago | 1
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How to update title of plot without it "wiggling"
hello my 2 cents suggestion : plot(rand(1,10),rand(1,10)) t = repmat([0 10],1,5); for k = 1:length(t) above10= t(k) -...
10 dagen ago | 0
Determine less than in for loop
hello does that reflect what you wanted to do ? clc clearvars % x = round(100*rand(1,10)); x = [11 96 0 77 ...
10 dagen ago | 0
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read a .txt file
hello have you tried to work with tables - using readtable ? filename = '0-3000.txt'; T = readtable(filename); C = table2c...
10 dagen ago | 0
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Error while plotting the surface
hello you need to create a grid from the 1D array x and y . This is done via meshgrid code : clc clearvars x = 0:1:100;...
11 dagen ago | 0
for loop stack the data
hello my suggestion if M is (like here) a 1D array so the col saved is always one; this can be removed from the code if ne...
11 dagen ago | 0
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How to set level values of a variable in a nc file
hello again3 so I tried to a few things to get the min and max points of the data and display them (the big crosses) I am stil...
11 dagen ago | 1
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How to add correlation factor to the plot?
hello see my little example below (your code does not show how you get the linear model fit data) clc clearvars % dummy...
11 dagen ago | 0
read special cell in excel file
hello again so here a small code to extract the lines where the 2 numbers in row 2 and row 3 are below a given threshold. FYI ...
12 dagen ago | 0
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Finding end of words in signal
hello you should first compute the envelope of your signal (for example using the function of same name envelope) simply do a...
12 dagen ago | 1
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How to adapt a function to a change of two points?
hello Daniel this is my suggestion - a simple anamorphosis of the curve along the vertical axis (= a vertical shift and a multi...
12 dagen ago | 0
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How do I create array of a function with for loop?
hello it's not the best coding practice, but it works ... clc clearvars % dummy data X1 = rand([424,412]); X2 = rand([4...
13 dagen ago | 1
How to plot power of wavelet transform.
hello again I simply run your code using the appropriate package the package and results are in the zip attached # Cross...
13 dagen ago | 0
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how to receive power values in and out the cone of influence in wavelet transform.
hello I assume this is related to your previous post How to plot power of wavelet transform. - MATLAB Answers - MATLAB Centr...
13 dagen ago | 0
The graphs of position, velocity and acceleration are wrong.
hello I didn't find any mistake in your original equations , but I am lazy and I found your code quite long and complicated......
13 dagen ago | 1
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Saving multiple plots into one folder with the specified figure name in code to jpg form
hello why not simply add this line of code after each figure : adjust the resolution to your needs (here 140 DPI) print('-dj...
14 dagen ago | 0
Attempting to detrend and remove noise from surface roughness data
hello my prefered function for smoothing data is smoothdata , but there are other options example below : clc close all ...
14 dagen ago | 0
