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Mathieu NOE


Hutchinson

Last seen: Today 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
Fitting Impedance data file to parallel RLC circuit model using fmincon
hello my attempt below - with just fminsearch (as I don't have the Optimisation Toolbox) I refined a bit the IC by manual...

8 hours ago | 0

Answered
Importing Excel from MATLAB
hello my 2 cents suggestion for looping over folders and files this can be further refined if you need an additionnal loop t...

12 hours ago | 0

Answered
how to convert cell array to numeric array?
maybe this ? >> a = {'fh8453655'} >> beginStr = regexp(a, '\d+', 'match'); >> beginNumbers = cellfun(@(x) str2double(x{1}), ...

13 hours ago | 0

Answered
I want to do fft analysis of the input signal but I am getting the following error
hello I had to tweak a bit my code because your data file does not have same amount of rows depending at which column we look ...

14 hours ago | 0

Answered
error in computing log values
hello the "log" error was just a consequence of an algebraic loop of OutletEnthalpy bloc : (its input is dependant of the P ou...

1 day ago | 0

Answered
How to interpolate 3 matrices?
hello Federico this is my suggestion : I give a given RPM target value and serach for all points in the 2D array that are clos...

1 day ago | 1

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Answered
Calculating Mean, Median, STD from an excel documents that has 68 sheets and in each sheet there are 20 columns
hello Sophie you can do everything within the first for loop I assumed that the min/max / med / average computation muts giv...

1 day ago | 0

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Answered
EQ from measurement-data
hello maybe you should share the data file (measurements) and code if you have already started one once we have created the ...

1 day ago | 0

Answered
Seperating individual signal as a seperate matfile
hello you can adapt the code below to your own needs this demo shows how to use a threshold crossing detector to define star...

1 day ago | 0

Answered
Heatmap log colour scale: caxis() doesn't map values correctly?
hello no mre problem my friend ! % Create log values and generate heatmap dim = 10; x = logspace(-5,5,dim); values = re...

2 days ago | 0

Answered
Issue with load from text file with hex data
my 2 cents suggestion >> a = readlines('textfilename.txt') a = "0xd080 " >> b = hex2dec(char(a)) b = ...

2 days ago | 0

Answered
extracting one cycle from multiple sinusoidal waves
hello I used zero crossing interpolation method to select the last cycle of the data the extracted data are interpolated beca...

2 days ago | 1

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Answered
How do we plot graphs from excel file?
hello this is my suggestion, hope it helps clc clearvars fileDir = pwd; sheet = 2; % data must be retrieved from sh...

2 days ago | 0

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Answered
Using Spectrogram to Design a Filter
hello I checked your code and it's correct the beeper fundamental frequency is around 1000 Hz while the owl is around 300 Hz...

3 days ago | 0

Answered
Logarithmic Decrement and Damp Ratio
hello a very late answer to this question - siply because this code was reused in another post FWIW, this is the answer I alr...

3 days ago | 0

Answered
I need help with The logarithmic decrement, The undamped natural frequency ,The damped natural frequency ,The damping ratio please
hello this would be my suggestion - damping ratio of 0.4 is found coherent with the fast decay plot will show the two succes...

3 days ago | 0

Answered
Out of memory. The likely cause is an infinite recursion within the program. Error in polyfit (line 3) p = polyfit(x,y,2);
No issue so far on my R2020b copy pasted your data in my demo code and worked without issue : clc clearvars % data ...

3 days ago | 0

Answered
Why isn't my graph plotting correctly?
hello I have a bit modified your code , I had to replace viscircles with a similar function (cercle ) - but you can easily com...

3 days ago | 0

Answered
what mistake I am making?
hello I simply tested the first data set when you do : impFatigueA = importdata('Fatigue_A.txt'); impFatigueA is a structu...

3 days ago | 0

Answered
Color scale of scatter plot?
hello A minor variation on the above suggestion % dummy data N = 100; Xc = 5; % center X coordinate Yc = 5; % center...

4 days ago | 0

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Answered
How to remove Outliers
hello here is a quick result after a few manipulations code clc clearvars T = readtable('AskingData.xlsx'); P = T....

4 days ago | 0

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Answered
How to use findpeaks to find the width of the peak at 1/e^2.
hello this would be my suggestion this code will find the peak value then from there you can tell at which y threshold value ...

7 days ago | 0

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Answered
How can I skip the first to lines from a text file and proceed to read the file with header lines in between the values?
hello Sarah this code will retrieve the numerical data of the 2nd column (3744 values) filename = 'BSH_HBM_tracer_productgrid_...

7 days ago | 0

Answered
How to find whether an array is logarithmically spaced
well if you have a criteria that works for lin spaced arrays (like checking that std(diff(y)) is always below a very low thresh...

8 days ago | 0

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Answered
Help! Evaluation of csv measurement data
hello Meike seems what you looking for is just a fraction of the full M array if you plot the full M array , we get this M...

8 days ago | 0

Answered
Avoiding drift while creating angular rotation with variable degree increments
hello why make things so complicated ? this way you can generate the pattern for the first revolution . if you want to have ...

9 days ago | 0

Answered
How to apply FFT or LombScargle to a discontinous signal?
hello I used fillmissing to fill the Inf values (created by your log10 of zero in your function) then the fft will show this ...

9 days ago | 1

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Answered
how to save variable as txt in a specified location with variable value appearing in the file name
hello try with (last two lines) f = f'; save(['Gauss' num2str(width) '.txt'], 'f','-ascii')

10 days ago | 0

Answered
How to give different colors to different regions of a signal(extracted from an audio amplitude-Fs)?
hello maybe this ? clc clearvars % signal Fs = 100; dt= 1 /Fs; samples = 5*Fs; % 5 seconds of signal freq = 3; ...

10 days ago | 0

Answered
How to add ramping in sin function
hello see my little demo below : clc clearvars % signal Fs = 100; dt= 1 /Fs; samples = 1e3; freq = 10; t = (0:sam...

11 days ago | 0

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