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

Contact

Mathieu NOE's Badges

View details...

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

| accepted

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

| accepted

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

| accepted

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

| accepted

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

| accepted

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

| accepted

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

| accepted

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

| accepted

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

| accepted

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

| accepted

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

| accepted

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

| accepted

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

| accepted