Mathieu NOE

Hutchinson

Last seen: 1 day ago | Active since 2015

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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Answered
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 day ago | 0

Answered
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 day ago | 0

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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 day ago | 0

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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 day ago | 0

Answered
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 days ago | 1

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Answered
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 days ago | 0

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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 days 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 days ago | 0

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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...

3 days 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...

3 days ago | 0

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adding contour lines to pcolor plot
hello again maybe this ? figure pcolor(dateVector, depth, combinedaverages') set(gca, 'YDir','reverse') shading flat ...

6 days ago | 0

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Answered
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 days ago | 0

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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 ...

8 days ago | 0

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Answered
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; ...

8 days ago | 0

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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 days ago | 0

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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 days ago | 0

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Answered
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 days ago | 0

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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 days ago | 0

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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 days ago | 0

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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]...

14 days ago | 0

Answered
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...

14 days ago | 1

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Answered
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 days ago | 1

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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 days ago | 0

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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 days ago | 0

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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 days ago | 1

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Answered
Bi-linear (piecewise) curve fitting
hello try this (a fairly simple code) T1 = readtable('testdata.xlsx'); x = T1.Displacement; y = T1.BaseForce; % top fl...

23 days ago | 0

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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 days ago | 0

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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 days ago | 0

Answered
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 days ago | 0

Answered
Smoothing for multiple csv files
hello xlsread is a bit outdated , you could try more recent alternatives (readtable, readcell , readmatrix,...) suggestion be...

24 days ago | 0

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Mathieu NOE

Hutchinson

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