# 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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**Content Feed**

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...

ungefär 2 timmar 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 ....

ungefär 2 timmar ago | 0

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...

ungefär 3 timmar 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 ...

3 dagar 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 ...

4 dagar 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]...

4 dagar 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...

4 dagar 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...

5 dagar 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 ...

5 dagar 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...

5 dagar 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 =[...

13 dagar ago | 1

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Bi-linear (piecewise) curve fitting

hello try this (a fairly simple code) T1 = readtable('testdata.xlsx'); x = T1.Displacement; y = T1.BaseForce; % top fl...

13 dagar 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...

14 dagar 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...

14 dagar 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 ...

14 dagar ago | 0

Smoothing for multiple csv files

hello xlsread is a bit outdated , you could try more recent alternatives (readtable, readcell , readmatrix,...) suggestion be...

14 dagar ago | 0

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how to filter the noise of a signal

hello I was surprised to see that your signal length is very long (730185 samples) and probably you are using a quite high sam...

20 dagar ago | 0

| accepted

Finding row index in a matrix in which the sum of the elements is greater than 1

hello here you are S=[1,0,0;0,1,0;1,1,0;0,1,1;0,0,1] row_sum = sum(S,2); rw_ind = find(row_sum>1)

ungefär en månad ago | 0

Automatically identify two numbers within an matrix

hello Alberto welcome back ! here a demo for the 'matrix.txt' case the other one is basically the same , simply change t...

ungefär en månad ago | 0

Averaging data over array of cyclic values when cycle length is variable

hello Marie my suggestion below is based on "zero crossing" detection points, to isolate the individual segments of data (corre...

ungefär en månad ago | 0

Reading Multiple CSV Files in a Sequence

hello that's the Achille heel of the native dir command it will not sort the file names correctly you need this : Natural-O...

ungefär en månad ago | 0

| accepted

How to make a good fittings

hello sorry I don't have the curve fitting toolbox but such a simple fit can be easily done with fminsearch the constant you...

ungefär en månad ago | 1

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Distortion introduced by filtering interpolated data.

hello when you do non unique data removal and interpolation, you are introducing a little distorsion in your original signal ,...

ungefär en månad ago | 0

Broadband signal deesign

hello maybe this you can tune the frequency range , frequency spacing and amplitudes distribution according to your preferen...

ungefär en månad ago | 0

Problem with Fourier Transform fft

hello when you do the fft with a buffer length equal your signal length (as you did) you get the maximal frequency resolution...

ungefär en månad ago | 0

Index in position 1 is invalid. Array indices must be positive integers or logical values.

hello depending of your format, the command window will display more or less decimals I suspect c(i,2) = 272.0000.............

ungefär en månad ago | 1

Smoothing the Data with For Loop (Sliding Window)

hello seems to me smoothdata can do what you need plot(temperature) hold on ts = smoothdata(temperature,'gaussian',30); ...

ungefär en månad ago | 0

error reading csv file

hello readtable reads your file without any issue you may have to do a bit of code updating T = readtable('MH.csv'); T ...

ungefär en månad ago | 0

Finding peaks with a set amplitude range?

hello see the demo code below : n = 100; x= 1:n; y = rand(1,n); [pks,locs] = findpeaks(y,x); logicalIndexes = (pks > ...

ungefär en månad ago | 0

How to find min/max points on a surface inside a given area

hello try this using inpolygon allows you to define the points inside your triangle the max point is given by the red diam...

ungefär en månad ago | 0

| accepted