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Mathieu NOE


Hutchinson

Last seen: Today |  Active since 2015

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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
Plotting a faired curve through a data set that curves in on itself
hello experimental airfoil data can exibit some randomness especially at high angle of attack (stall) we usually prefer to s...

34 minutes ago | 0

Answered
Hi, i want to plot two columns of values of data from excel, the graph includes a zero while the excel sheet doesn't. Here is my code and the graph I got vs what I should get
hello again so your arrays contains 0 after row 22 til the end, that's why your plot goes back to the origin point (this was a...

2 hours ago | 0

Answered
How can I get more divisions in x- and y- axes scaling when plotting with imagesc to have a clear picture and introduce the proper scaling along x- & y- axes?
hello simply specify the number of points when you call linspace here I introduced N = 500 (N = 100 by default) N = 500; [x...

21 hours ago | 0

Answered
Clean noisy data from images
hello this is a simple exponential fit using polyfit I had to do a bit of manual tweaks first to slect the appropriate data ...

22 hours ago | 0

Answered
Fit gaussian to X-Y data (one X column, multiple Y column), for each Y column from an excel file.
coming late in the show try this ... if your data is "good" you can this this result , otherwise the fit may not allow any F...

11 days ago | 1

Answered
draw the amplitude-frequency characteristic curve of a particular transfer function
Simply used your info and coded in matlab you have now here the right half of the plot , if you need both negative and positiv...

11 days ago | 0

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Answered
How to fix my linear fit model?
yet another simple solution, using fminsearch (the no toolbox solution) % data laser = [0 1 2 3 4 5 6 7 8 10 11 12 13 14 15 16...

11 days ago | 1

Answered
How to fix my linear fit model?
hello simply change your equation for the second part with a x shift rajaarvo = @(I) 0.1*I.*(I>=0 & I<18)+25*I.*(I>=18 & I<=...

13 days ago | 1

Answered
Plot change in velocity
hello again we could use gradient or the function provided below then all vectors are of same size (101 samples) which allo...

13 days ago | 0

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Answered
How can I fix "Index in position 2 exceeds array bounds" in for loop?
hello to make your code work, b should be initiallized with same dimensions as a (as a vector, not just one scalar) also it's...

13 days ago | 0

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Answered
Identify local minima in 3D plot/coordinate data
hello this is what you need : Find local minima - MATLAB islocalmin - MathWorks France try this load('sampledata.mat') ...

13 days ago | 0

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Answered
Environmental data band-pass filter
it's me again :) ! I'm just guessing, maybe this is what you wanted (baseline correction) clc clear; data_datalog = load('...

14 days ago | 0

Answered
How do I count the number of times my graph crosses two separate lines?
hello maybe this ? the second plot shows the valid points (Ncounts = 4) % dummy data n = 5000; x = 50*(0:n-1)/n; y = -...

14 days ago | 0

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Answered
How to combine two data file in one file?
hello try this : IQ_data = [2756.00000000000 - 1252.00000000000i 2681.00000000000 - 992.000000000000i 2540.00000000000 - 6...

14 days ago | 0

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Answered
Adding specified loop outputs
hello again seems to me you want to sum the first 3 rows so it should be : Sum1=sum(output(1:3,:)); instead of Sum1=su...

14 days ago | 1

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Answered
How to find Quadratic Equivalent Damping?
hello again with some delay, here now the code modified and extended of course we already had the (equivalent) linear damping...

18 days ago | 0

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Answered
Problem in finding the correct Chebyshev interpolation line
hello maybe this ? %% Data input x_data = [1830; 1920; 1940; 1975; 2000; 2020]; %x values y_data = [0.089; 3.52; 4.86; 17....

20 days ago | 0

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Answered
Why does the psd of my filtered signal perfectly overlap my raw signal's one?
hello see code below, the effect of the low pass filter is clearly to be seen on the psd plot now I wonder whatkind of "activ...

20 days ago | 1

Answered
Plotting phase noise vs offset frequency of an optoelectronic oscillator...
hello the main problem is that your data has a very coarse frequency resolution so if I remove the content below 10GHz , rem...

21 days ago | 0

Answered
Need to put symbols on curve
Like that ? %===========================================================% clc close all; clear; workspace; %===========...

21 days ago | 0

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Answered
Shift Filter outputs to align peaks
hello @Chunru sorry but I was a bit skeptical about your solution based on group delay seems to me the "aligned" output signa...

21 days ago | 1

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Answered
Can I smoothen the cdfplot() result?
some more code to look at - I kept only the best solutions , even though there are probably lot of other solutions also I intr...

21 days ago | 1

Answered
How to do optimization coding for minimize peak width ?
hello I simply added a for loop for the del parameter to see how peak amplitude and peak width of the red curve would evolve v...

25 days ago | 0

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Answered
While loop using up to input and fixing input definition
Hello gain, so this is the code with the small changes mentionned above clc clearvars close all fs = 20e3; numFilts = 32;...

29 days ago | 1

Answered
required assistance in fitting
so this is the poor"s man optimization (w/o any toolbox) a brute force approach , let's create a 2 parameter grid and evaluate ...

1 month ago | 0

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Answered
I wanted to combine 100 csv files for plotting in Matlab. All the files have same number of columns and rows. Can anyone help?
maybe this ? here I wanted to do a vertical concatenation - up to you to change that portion of the code also , if processi...

1 month ago | 0

Answered
High Frequency Noise baseline filter
hello again an explosive blast record will have a very wide frequency range , the spectrogram will tell you that the signal e...

1 month ago | 0

Answered
Plot velocity profiles along a slope
hello again so this is a starter , would need further work to define correct range of the ruler according to your data %% cre...

1 month ago | 0

Answered
How to delete every nth column in table?
maybe this ? X = (1:9)'*(1:10:50); % remove only 2nd column t = array2table(X,'VariableNames',{'t' 'x' 'y' 'z' 'r'}) t(...

1 month ago | 0

Answered
How would i change this code so that it plots all of the circular paths and markers all at once instead of one after the other?
simply commenting the inner for loop , and you get this result : (I also reduced the number of theta points by factor 2 ) : th...

1 month ago | 0

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