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
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
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Awarded to Mathieu NOE on 17 Dec 2020
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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
differentiate between month in dataset.
hello maybe this ? % simplified code for one year scalar input years = 2023; % mm = (1:12); % monthes days_per_month =...
1 dag ago | 0
getting errors while trying to plot
the error message is quite clear Unable to find file or directory 'negm_profiles.txt'. this file is not in your directory do...
1 dag ago | 0
Help with computing FFT
hello here some suggestions and mods I did in your code remove the initial transient (t< 0.1 s) detrend data (so you don't ...
1 dag ago | 0
How to put fitting constraints on smoothing splines
hello this is the poor's man suggestion, (no Curve Fitting toolbox, no spline smoothing) try it and let me know load data...
1 dag ago | 0
the maximum difference bewteen lines from a loop and plot
hello see updated code below clear all; close all W_takeoff = 10000; W_landing=6000; S = 20; AR = 5; cd0 = 0.02; k = 1...
2 dagen ago | 1
| accepted
Why am I getting the same colour of the legend for the last 2 plots?
add one more line at the end of your script, add : hold off
2 dagen ago | 0
How to get matlab to write txt file without a column from the big text file its split from
hello this is a minor change to your code look for the two lines where I added the comment : % <= here basically I creat...
2 dagen ago | 0
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Analyse Time Series Data based on Seasonality
hello I wished I had some files to test the code , but let's go directly to the task I simply extracted from the filename th...
2 dagen ago | 0
How to shift data sets automatically
hello myabe this ? I took the options to have both peaks overlaid and also the two curves have same initial y value This i...
4 dagen ago | 0
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I want to improve the mesh of my graph ?
hello sure you can use interp2 see example below I opted for spline method for a smoother surface rendering clear clc...
4 dagen ago | 0
adding contour lines to pcolor plot
hello again maybe this ? figure pcolor(dateVector, depth, combinedaverages') set(gca, 'YDir','reverse') shading flat ...
7 dagen ago | 0
| accepted
How to fit data on a specific region, using lsqcurvefit or any other?
hello fyi, some results obtained with the poor's man solution (based on fminsearch) NB : I changed your log10 to log in my c...
8 dagen ago | 0
Why does a frequency input for a chirp not work?
hello fixed a few mistakes in your code the most obvious one is when you compute a sinewave . You have to remember that you ...
9 dagen ago | 0
| accepted
Change the period/frequency of a Van der Pol Oscillator
hello seems to me your code actually generates the correct frequency signal at 0.8 Hz , as soon as you stick with f = 0.8; ...
9 dagen ago | 0
finding peak points while signal processing
hello most obviousy you didn't peak the right data in this plot (a copy paste from above that I fixed below, look for the comm...
10 dagen ago | 0
| accepted
How to plot a temperature contour from an excel file on MATLAB ?
hello maybe this ? I am not sure to understand what you mean by i want the width to be 50 mm and the height to be 220 mm ....
10 dagen ago | 0
| accepted
merge multiple excel file data
hello try this to make sure to get the files in the right ordre please download first this submission Natural-Order Filenam...
10 dagen ago | 0
Is it possible to calculate variating signal frequency?
hello Niki try this below frequency is computed by finding a "zero" (or any other threshold value) crossing point with your ...
13 dagen ago | 0
How to delete odd columns and odd rows from a image
helllo try this (A is a array we keep only the even rows and columns) % create dummy A array a = (1:10); for ci = 1:10 ...
14 dagen ago | 0
Find min value of each column of 2D lattice and plot
not sure if I understood really what you want to do maybe this ? clc clear N = 10; [x,y] = meshgrid(1:N,1:N); xlim([1,N]...
15 dagen ago | 0
Plot a plane from 3 points
hello Alberto welcome back I was first a bit puzzled because you speak of "line" whereas we are talking here "plane" that goe...
15 dagen ago | 1
| accepted
How to accurately measure the height of a 3D structure?
hello this is my rough first trial NB that I didn't use here any surface smoothing (needs still to be implemented) but I as...
15 dagen ago | 1
| accepted
How to get a csv file from matlab
hi nothing complicated here - try this , I used a smaller array size for the example but it should work for your larger array ...
15 dagen ago | 0
Interpolated data is drifting downward
hello I don't really understand your problem and why you make the code so complicated I assumed the issue is simply you have...
15 dagen ago | 0
How to use isoutlier based in a part of the data?
hello why not using islocalmin ? seems to me what you want is to keep the first 3 points (corresponding to a local min) a =[...
23 dagen ago | 1
| accepted
Bi-linear (piecewise) curve fitting
hello try this (a fairly simple code) T1 = readtable('testdata.xlsx'); x = T1.Displacement; y = T1.BaseForce; % top fl...
24 dagen ago | 0
| accepted
2D plot of deformation data
hello again basically used the same code for U and V and got these 3 plots for ColorData for U for V code : data...
24 dagen ago | 0
| accepted
Hi , all there , i have an excel file that i want to split it by special element value in the file to some files . how can i make it possoble with matlab
hello try this I created first a dummy array with some zeros at lines 25 / 75 / 85 so the for loop will split the data with...
24 dagen ago | 0
Finding delay b/w two signals using gccphat
hello I think I can get the correct result with the regular xcorr function (I have not the toolbox for gccphat function) but ...
24 dagen ago | 0
Smoothing for multiple csv files
hello xlsread is a bit outdated , you could try more recent alternatives (readtable, readcell , readmatrix,...) suggestion be...
24 dagen ago | 0
| accepted
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