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 24 consecutive months
Awarded to Mathieu NOE on 02 Oct 2022
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Awarded to Mathieu NOE on 08 Jul 2021
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Awarded to Mathieu NOE on 18 Mar 2021
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Content Feed
Eliminating the noise from the raw data using median filter
hello again is it now smooth enough ? % Remove quiet parts of a signal. clc; close all; clear; workspace; format ...
12 hours ago | 0
How to interpolate/resample an irregular dataset into 1 step spacing?
hello Becky try this the second case means you ask interp1 to do extrapolation, as your original x data do not covers the en...
4 days ago | 0
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How to simulate data from txt correctly?
hello I tried to reproduce your problem , but got the right output , not what you show... hope the attached files can help you...
6 days ago | 1
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import a certain text file .txt from a specific folder
hello again for numerical arrays use readmatrix instead of importdata folder = 'C:\Users\Alberto\....'; % folder where the .t...
6 days ago | 0
save .TXT inside a specific folder
hello try this new_folder = 'C:\Users\....\Folder A' A = ; % matrix 200x3 double save(fullfile(new_folder, 'file.txt'), 'A...
6 days ago | 0
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How can I write self-invoking code for hundreds of wav files for the same loop and call those files to matlab?
hello something like this ? this demoes the excellent FEX submission Natural-Order Filename Sort - File Exchange - MATLAB ...
7 days ago | 1
Identify lines that have a repetition (unique function)
hello simply this now the 4th column is your repetition quantity a=readmatrix("file.txt"); [output,ia,ic]=unique(a,'rows'...
8 days ago | 0
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How to compute the correlation coefficient in the two data set.
hello so once we have digitized the picture with grabit , we have two data mat files (attached) available for further processi...
8 days ago | 0
Fourier Transform of window functions
hello maybe this can help you wL = 30; % window length win1 = hanning(wL); win1 = win1/sum(win1); % normalize win2 = t...
11 days ago | 1
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Downsampled data exceeds the input data
a demo is maybe more efficient here so the original data gets resampled at 60 Hz by using only the start / end points of the t...
11 days ago | 1
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smoothing with Gaussian Kernel for loop problem
hello try this lambda = 0.05; tv = (1:1:1000)'; nv =length(tv); ys = sin(4*pi*tv./max(tv))+0.25*rand(nv,1);% dummy data...
11 days ago | 0
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Correlation of similar Signals
hello maybe this ? define a buffer lenth and an overlap (here I took the max possible overlap) and use corrcoef (take the no...
11 days ago | 0
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Import not consistent table data
hello again so this first simple code will extract the data as one single block if you need to separate the data in individu...
11 days ago | 1
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date time from filename
hello try this code below I use fullfile instead of your method to concat folder and basename your path and filenames shoul...
13 days ago | 0
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creating the chorus effect without using a loop
hello the chorus effect is basically a multiple echo effect ; the echo by itself is a delayed version of the original signal ,...
14 days ago | 1
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How can I disregard part of the signal when calculating midline of my data signal?
hello see code below for midline and signal oscillation frequency computation (cycle to cycle "zero" crossing detection) a PI...
14 days ago | 0
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Import multiple .txt files and add separate arrays for each
hello Alex see code below natsortfiles may be an option if there is a stringent need to process the files in a truly sorted ...
14 days ago | 0
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How to smooth the curve indicated on the image?
hello you can try this adjust the amount of smoothing (and window type ) in this line : rs = smoothdata(r_new,'gaussian'...
14 days ago | 0
How can I boost audio with a peak filter?
hello according to the doc Design second-order tunable notching and peaking IIR filter - Simulink - MathWorks France this i...
15 days ago | 0
Collect several satellite images from the INPE/CPTEC collection
hello Augusto try this code as far as I could find out there are pictures available with a time delta of 10 minutes choose ...
15 days ago | 0
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How to fit a data to a model without using Statistical Toolbox?
hello @Decy it seems the model choosen is not realy a good match with the data (or vice versa) here a demo using fminsearch wi...
15 days ago | 0
Find all global minima und maxima of an Graph
hello Benedikt someone will probably tell you how findpeaks is powerfull but sometimes I simply prefer to rely on old but good ...
19 days ago | 1
Generating sequences with minimal overlap
hello maybe this ... the result appears in store_str (in your command window) % init edges = (1:1:9); k = 0; store = [];...
19 days ago | 0
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Check the data and replace it with corresponding values
hello Adeline try this code to make it a bit more compact and faster I remove the empty columns in your data file. the code w...
20 days ago | 0
Script for audio analyzing
hello try this code FYI, having the sampling rate at 1MHz is massive overkill if you intend to analyse only below 1 kHz. I...
20 days ago | 0
How can I find data on excel file and paste it back on excel?
hello you can try this code it could be made a bit simpler bu using the fact that the data to be retrieved from sheet 2 foll...
20 days ago | 0
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FFT spectral leak?
hello the amplitude accuracy depends if your signal frequency matches or not the fft frequency vector bins . If not your estim...
20 days ago | 0
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Problems using 'tfest' for generating transfer function
hello again here a bunch of files to post process your data I don't have the ID toolbox but I have the Signal Processing Tbx...
21 days ago | 0
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TXT File Population with Arrays and Text
hello maybe not the cleanest code but writecell make this doable without to much headaches % export results to txt filenam...
22 days ago | 0
Collect cmorph data through matlab command window
Quick and dirty fix for the date , as we have it in the nc file name % Download the CPC data used in the script below % Direct...
22 days ago | 0
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