Mathieu NOE
Last seen: 3 days ago
Hutchinson
491 total contributions since 2015Engineer - 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 6 consecutive months
Awarded to Mathieu NOE on 02 Apr 2021
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Awarded to Mathieu NOE on 18 Mar 2021
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Awarded to Mathieu NOE on 17 Dec 2020
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Awarded to Mathieu NOE on 30 Oct 2020
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Awarded to Mathieu NOE on 09 Jun 2020
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Awarded to Mathieu NOE on 09 Oct 2019
Zeros between Sign Change of Values in column
hello this is my suggestion below + see attachements data = importdata('data.txt'); x = data(:,1); y = data(:,2); thr...
5 days ago | 0
I want to do loop operation of these files but fail to get the desired result. Can anyone help me to figure out the problem?
hello I tweaked a bit your code , if fact it was simpler in my opinion to do the full 4 x 4 loops instead of doing the specifi...
5 days ago | 0
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Assign same linewidth to a grouped barplot
hello v1=rand(10,1); v2=rand(10,1); x=[1:10]; combined=[v1,v2]; barplot=bar(x,combined,'grouped'); barplot(1).BarWidth = ...
5 days ago | 1
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Generate Frequency domain with FFT function of 3-axis accelerometer data
hello see this example - you can adapt it to your own needs all the best %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % load s...
5 days ago | 0
Remove rows from table identified in a second string array
hello Christopher thi would be my suggestion notice I changed the last 3 names in Post_Inflate_names to get a matching case ...
6 days ago | 0
Fit an exponential function to time-series data
hello this is the poor man solution without any toolbox data was stored in txt file your B = -1/b_sol from my code below ...
6 days ago | 1
How to identify datasegments that correlate to a given frequency
hello Katy I built this on your code, so first option is to see if the time interval between consecutive peaks are similar or n...
6 days ago | 0
Rename dynamically columns name of a vector inside of a for loop
hello Sara if you stick to the eval method , this is how you should code it : eval(['d_' num2str(kk) ' = d;'])
6 days ago | 0
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How can I change the color of the face of a cube created using the slice command?
hello use handles to modify face colors here I changes all external faces to black [X,Y,Z] = meshgrid(0:3); V = X.*exp(-X....
6 days ago | 0
How do I add noise to a sine wave signal to get the output below
hello simply the time vector was not correct , just define it once for all plots (and with max value = 10 s and not 1 s) als...
6 days ago | 1
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Reading data from multiple files in ascending order.
hello this is my suggestion , based on natsortfiles (from FEX : Natural-Order Filename Sort - File Exchange - MATLAB Central ...
10 days ago | 0
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How to specify order of a Moving Average Filter?
hello a moving average filter has only a window length (and window type) as parameters, the order is not meaningfull here may...
10 days ago | 1
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Hysteresis curve and envelope
hello Emily this is how I solved it (blue curve) hope it helps %Column 2 Force vs Displacement clc;clear;close all; %Tra...
10 days ago | 0
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How can specify interval of variables in fsurf?
hi see 'MeshDensity' — Number of evaluation points per direction Control Resolution of Surface Plot Control the resolution o...
12 days ago | 0
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Reduce the error formed due to unexpected condition in time series data. Time series correction
hello see some suggestions for data correction and smoothing in my code below hope it helps all the best clc close a...
12 days ago | 0
How to plot these traces after a fixed interval?
hello this is it : C = randn(2000,30); data = filter(ones(1,100),1,C); ind = [5, 15, 25]; % your angles figure(1), w...
13 days ago | 0
FFT and time domain
hello see my example below I used nfft = 48 and 95% overlap to have best display of spectrograms clc clearvars %%%%%%%%...
13 days ago | 0
How to plot the “Response” and the “damping exponential function of the transient solution” on the same figure?
hello If you have the Signal Processing Tbx, envelope was made for you clear all;close all; clc; xss=0.01; wf=40; wn=2...
13 days ago | 0
I have multiple signal plots in one graph and i want to add their amplitudes to get one graph only
hello here you are : n1=1.45; n2=2.65; c=299792458; a=259*10^-9; b=142*10^-9; G=a+b; Lambda0=1.5*10^-6; Omega0=2*pi...
13 days ago | 0
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Finding the time in which a specific value is reached in time-series data when peaks are found
hello I would suggest you use first a lowpass filter with long enought time constant (equivalent to moving average with buffe...
13 days ago | 0
How do I solve two different differential equations at the same time?
hello to do simple integration, you could start with cumtrapz to get the velocity data (from the force inputs) the time vecto...
13 days ago | 1
How to use output numbers as a vector.
hello see bleow : clear variable clc a=input('Please input a vector of integers : '); c=length(a); for d = unique(a(:)) ...
13 days ago | 0
How do I fix my x-axis ?
hello here you are : x = 0:1e-3:2; y1=8*cos(2*pi*x); y2=8*cos(19*pi*x).*exp(-x); figure(1),plot(x,y1,x,y2)
17 days ago | 1
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Write legend on for loop plot
hello try this : X = [1.182, 1.6, 1.7, 1.8, 1.9, 2] NumberOfScenarios = [1, 2, 3] Scenarios = string(NumberOfScenarios); ...
20 days ago | 1
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Find the value at exact location in a text file
hello hope this helps I used the attached function to load the data (FYI) % demo clc clearvars; % load data [outdat...
20 days ago | 0
ECG signal filtering problem
hello a little tool to do the fft anamysis (and notch filter demo included) clc clearvars %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%...
21 days ago | 0
How analyze PMU data in the form of sinusoidal waveform?
hello I am not sure what your data represents, but FYI, this is a code to do spectral analysis (averaged fft and spectrogram) ...
21 days ago | 1
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How to smooth a curve
hello your post is a bit rude, please take 10 seconds to say hello and introduce your topic; that would be a little more respe...
21 days ago | 0
How to resample frequency domain signal?
hello first code below : this is a script showing true averaging (even on complex Y data) over N samples your ac...
21 days ago | 0
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Echo generation of FIR sytem
hello my code as example : infile='DirectGuitar.wav'; outfile='out_echo.wav'; % read the sample waveform [x,Fs] = audiore...
21 days ago | 0
| accepted
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