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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Contribute at least one answer each month for 12 consecutive months
Awarded to Mathieu NOE on 02 Oct 2021
Answer 10 questions that were unanswered for more than 30 days
Awarded to Mathieu NOE on 08 Jul 2021
Accept 1 answer given by other contributors
Awarded to Mathieu NOE on 18 Mar 2021
100 of your answers have been accepted
Awarded to Mathieu NOE on 17 Dec 2020
Provide your first answer ever to someone else's question
Awarded to Mathieu NOE on 09 Jun 2020
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Awarded to Mathieu NOE on 01 May 2020
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Awarded to Mathieu NOE on 09 Oct 2019
Content Feed
Create a better plot
hello maybe you want to make an animated line demo : %% create animatedline object / handle figure h1 = animatedline; ...
alrededor de 10 horas ago | 0
| accepted
how to calculate fast Fourier transform with a 128-point window on these data with non-uniform sampling frequency
hello see my suggestion below the result is in Area clc clearvars load('DATA3.mat'); t3 = data3(:,1); %% uniform re...
alrededor de 14 horas ago | 0
How to cut ASCII file with matlab ?
hello Mathieu this would be my suggestion - create a structure with field names taken from your data file - See the function...
alrededor de 15 horas ago | 0
| accepted
How to extract the maximum value of an area of a figure?
hello so your data is a matrix (hrms) what is the dimension of hrms ? you are probably confused between the range of that y...
alrededor de 16 horas ago | 0
Find maximum in graphic
hello following this example : A = [1 2 3; 4 5 6] [M,ind] = max(A,[],'all','linear') % max value of matrix [row,col] = in...
1 día ago | 0
data extraction from f06 file
hello my friend here you are the result is stored in Result_c clc clearvars fileID = fopen('flutter_2d_rh_wing_base.f0...
6 días ago | 0
| accepted
How to fill missing frequency response data at the beginning and end?
Nathan as said above, here the full code : %% playgroundFillGaps clc;clear;close;format compact; format short g; newFs = ...
8 días ago | 0
| accepted
I am trying to write a function to calculate frequency of a signal by comparing values to a threshold.
hello FYI demo with constant and non constant signals period are computed by getting the threshold crossing time data hop...
9 días ago | 0
How to print line from txt file based off of keywords
hello seems I have already seen that question in the recent past .... %%%%%%%% main code %%%%%%%%% clc clearvars filenam...
11 días ago | 1
Extracting multiple row values (with unequal range) in a column separately
hello try this : clc;clear all a = readmatrix('saf_wind.csv'); ind_header = find(isnan(a)); % lines with 'P DEW' (seperate...
13 días ago | 1
| accepted
Correlation coefficient calculation error
hello seems to me the code could be made simpler, why the need to make all this cell acrobatics ? clear;clc;close all S = l...
13 días ago | 0
| accepted
Error: File: frelay_oldOf_09Jun2022_MINLP.m Line: 434 Column: 1 Illegal use of reserved keyword "end".
hi see the line : out_tbn=[tb1n tb2n tb3n tb4n tb5n..... is missing a closing bracket
13 días ago | 0
Find flat regions in a signal above origin (time series data)
hello IMHO, you don't need the peaks code (and the for loop) to make the low amplitude signals to zero you can do it directly...
13 días ago | 0
| accepted
Surface roughness analysis from raw data
hello this is a starter , to do the spectral analysis of your data then you can use some low / high or bandpass filters to f...
16 días ago | 0
Issue with locating end of poorly defined peak
hello again tried this - does it help ? load('iso.mat') curve = 10; % which curve do you want to plot ? data = per...
16 días ago | 0
| accepted
Why do I get zero frequencies in a fft when the constant offset is already removed?
hello the fft seems to me inappropriate in this case. If the goal was to find the time difference between the succesive pulses...
20 días ago | 0
| accepted
Gradient of a multiple line 2d plot,
hello I see you have a passion for for loops ! maybe you can do yours plots without a for loop this time . Added some code...
22 días ago | 0
| accepted
how can I calculate movmean from 1 periode wave data?
hello we can use the peaks to compute this value as well you can use islocalmax (or islocalmin) to locate local peaks. Some...
22 días ago | 0
HOW TO PLOT X VS Y AT DIFFERENT Z
hello maybe this ? NB : I used large steps for pressure and temperature to avoid creating very large arrays - adapt to your ...
22 días ago | 0
Get y value in plot(t-s diagram)
hello see my demo based on dummy data - trying to reproduce your case code : clc clearvars % dummy data n=1000; y= ...
25 días ago | 0
| accepted
How to load a specific column from files + FFT function
helo again as the signals are quite nn stationnary I assumed that a spectrogram is more appropriate than a "simple" FFT (with o...
25 días ago | 1
| accepted
for loop summation problem
hello please clarify what is a and b in your request. Usually those letters are used for numerator (B) and denominator (A) of ...
26 días ago | 0
Why am I unable to open .csv file with the readmatrix function?
hello workaround suggestions faster with readcell vs importdata >> tic; out2 = str2double(split(readcell('t4md6p1 - partia...
26 días ago | 1
| accepted
How can I cut the number of frames down?
hello Hannah I tried to improve my first (very simple suggestion) here some (hopefully) improvements : detection of "valid" ...
28 días ago | 0
| accepted
Using a for loop to read in 16 data sheets and storing one value from each data sheet in a vector - full problem explained
hello I don't see why the code needs two for loops seems to me one suffice and this code gives the answer in mSTRESS (vector...
28 días ago | 1
| accepted
How to load a specific column from files + FFT function
hello my first suggestion is for looping inside a folder to load txt file data % read current filenames in folder S = di...
29 días ago | 1
What is the best option to import individual columns from text files?
hello see suggestion below you can expand on this code to add a condition statement on the file counts to switch from 3rd t...
29 días ago | 1
Plotting two graphs simultaneously in a for loop
hello using your x and y data , see answer (example) below : %% create animatedline object / handle figure h1 = animatedli...
29 días ago | 0
ECG signal baseline drift correction
hello a simple high pass filter suffices %--Load Real signal--% load ('100m.mat'); RealECG = val/200; Fs = 360; % Hz L ...
29 días ago | 0
Running 4 MATLAB Scripts to read, process and plot data from many csv files
hello see example below clc clearvars %% define path yourpath = pwd; % or your specific path list=dir(yourpath); %get ...
alrededor de 1 mes ago | 1
| accepted
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