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Mathieu NOE


Last seen: 2 days ago

HUTCHINSON

196 total contributions 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
fft finding oscillation frequency and strouhal number for lift
hello it's difficult to test your code if you share it only as a picture it looks ok but if you want to double check this is...

4 days ago | 0

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Answered
Move to the next row when reading the .csv file using csvread()
hello why making this so overly complicated ? m = csvread('data_points.csv') % gives : % % m = % % Columns 1 thr...

4 days ago | 0

Answered
How to estimate annual and semi-annual signals?
hello you're not stuck anymore below my code (the h parameters computation is the same as DFT coefficients) if you're stisfie...

4 days ago | 1

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Answered
Bring some signals to the same start value and end value
hello if you want all data to start and stop at the same values , you can do that : it works even sampling rates are different...

5 days ago | 0

Answered
How can I read multiple mat files and perform ttest2 function?
hello my single for loop code example enjoy n = 108;; % number of files s = 2; % create combination of 2 elements [comb...

5 days ago | 0

Answered
How can I extract the width of the following graph.
hello this piece of code will give you the angle . Demo based on a half sinus wave. you can easily apply it to your case x= l...

5 days ago | 1

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Answered
How to filter all the frequencies from the audio signal.
hello 2 gifts for you today (lucky man !) a code for general spectral analysis examples of digital filters you can use to el...

5 days ago | 0

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Answered
how to convert double .mat file to a column of numbers on excel
hello so this is a very basic code to load the data and store it as one column in an excel file. I am not sure to understand ...

5 days ago | 1

Answered
why 50hz can't be removed compeletely?
hello again I like simple solutions - see demo code below adapted to your case I hope 200 dB attenuation can be considered as ...

5 days ago | 0

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Answered
Digital Signal Processing Filters
hello 1/ this is obviously an IIR filter as it has a denominator, which means the past outputs are also in the recursive equat...

6 days ago | 1

Answered
why 50hz can't be removed compeletely?
hello 2 gifts for you in the same day (you lucky ! ) a code for spectral analysis and time / frequency analysis a the end , ...

6 days ago | 0

Answered
How to read table from pdf
hello I don't know where the function extractFileText comes from So I'd did it my way : converted the pdf in excel file (on ...

6 days ago | 0

Answered
Fitting gaussian exponential to logscale
hello this a code that seems to work hope it helps I prefered to simplify as much the work of the optimizer , so first conv...

6 days ago | 1

Answered
How do I resample to have a uniform number of samples for each cycle of my signal?
hello Cai this little demo code for generating exactly 800 samples between each cycles load('maxamp.mat'); y = maxamp; sam...

6 days ago | 0

Answered
How to convert Acceleration- Time graph to Acceleration- Frequency graph?
hello you need to do some time / frequency analysis using STFT see specgram demo below : clc clear all %%%%%%%%%%%%%%%%...

6 days ago | 0

Answered
Signal Spectrum Plotting help
hello maybe you are taking about time / frequency analysis ? I can forward you my demo script about spectral analysis , yo...

6 days ago | 0

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Answered
Importing data from a .ASC file into different columns
hello a quick and dirty code for a 3 variables file example; there is certainly room for making it more generic hope it helps ...

9 days ago | 0

Answered
Plotting amplitude of individual frequencies over time.
hello this is a typical case were my little code snipset can be useful !! if you need to refine the frequency resolution, in...

10 days ago | 0

Answered
Implementing the Chorus Effect
hello again so this could be considered as a vectorized version of the original code. You can add multiple delayed versions of ...

10 days ago | 0

Answered
How does resample exactly work?
hello everything is explained if you type help resample resample Resample uniform or nonuniform data to a new fixed rate. ...

12 days ago | 0

Answered
Determine acceleretion sensitivity for accelerometer
hello the ADXL specs says the bandwith is 0 to 1500 Hz. The mems accels do measure static (gravity), so make sure you have not ...

12 days ago | 0

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Answered
Condition for Specific Data collection
hello see example below this could be interesting for data 1 example but the two other data it's not feasible unless someo...

12 days ago | 1

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Answered
importing data and plotting
hello impordata or readtable will do the trick example with impordata : importdata('abg20000212dminn.txt') ans = 14...

12 days ago | 0

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Answered
Curve is not fitting
hello Simona I had to modify the model fit equation to get it to work I used : = a.*(1-1./(1+exp(b.*(x-c)))); instead of y=...

12 days ago | 1

Answered
How can I rotate the Labels in Heatmap Chart ??
hello this is an example for 45° orientation, put your prefered angle set(gca,'XTickLabelRotation',45)

12 days ago | 0

Answered
How to make a signal have a slower sample rate
so this would be the code : samples = 1000; input_signal = 1 + sin(2*pi*(1:samples)/samples)+ 0.025*rand(1,samples); decim_f...

12 days ago | 1

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Answered
how to import average of monthly data from excel file?
hello this is a simple code that will extract monthly data and look for solar radiation above 200 each month data will then...

13 days ago | 1

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Answered
How to make a signal have a slower sample rate
hello for integer factor downsampling use : decimate for non integer factor resampling use resample (not needed in your case...

13 days ago | 0

Answered
Designing IIR Filters using Bilinear Transform
so final and last version of the answer : N = 2; fc = [500 1000]; FS = 8000; fcn = 2*fc/FS; T = 1/FS; freq = logspace(2...

13 days ago | 0

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Answered
Excluding matrix indices which fall outside of a specified area.
hello this would be my suggestion ... n = 50; Z = peaks(n); %returns an n-by-n matrix. Z = abs(Z); Z = Z./max(max(Z)); Z...

13 days ago | 0

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