# 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**

Read images based on datetime

hello Sigmund this is a starter .... In the middle of my brainstorming I was momentary worried that in 'Struct' the filename ...

circa 13 ore fa | 0

how to separate a large text file into individual text files based on date, but also export headers?

So here we go A code that is certainly not as refined as StarStrider's .... filename = 'Gwynedd_1992.txt'; [outdata] = readc...

circa 15 ore fa | 0

How to generate Image from Raw Data and find Peak Value

hello try this code below the peak coordinates are stored in xmax and ymax for one single peak , max is sufficient; if you ...

circa 17 ore fa | 0

I need to plot circles with different radius and centers .Also I need to extract that information of centers and radius.

hello no need to use meshgrid here (why ??) try this instead the centers and circles are plotted with same color here (bu...

2 giorni fa | 0

Area Normalize EPR Spectra

hello I presume that negative signal area should aslo be counted as positive area so this line is wrong AreaUnder...

3 giorni fa | 0

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Hi there, i just want to design and apply a 2s hanning window with 50% overlapp on my EEG signal in order to segment it , i've tried with @hann command but i couldn't get it

hello see example below the signal gets splitted in 2s buffer and windowed see the subfunction at the bottom of the code :...

5 giorni fa | 0

Data fitting in between following variables x and b for quadratic equation

hello again seems to me b can be expressed as a first order polynomial of x b = 1.4952 + 0.0097108*x you can of course inc...

5 giorni fa | 0

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In a function we need to input the first element of matrix?

hello simply this. personnay I don't like to use the same variable name in both iput and output of a function . y = myFIRST...

5 giorni fa | 0

how to plot repeating steps graph real time/animated

hello maybe this %% create animatedline object / handle figure h1 = animatedline; h1.Marker = '*'; h1.Color = [1 0 1]; ...

8 giorni fa | 0

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Saving 2D index ranges in a single variable

hello why not this : % Input image rawImage = rand(50, 100); % Save a 6px x 3px ROI % roi_xrange = [1:3]; % roi_yrange =...

9 giorni fa | 0

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To find exponent in power law equation of the form y = ax^m + b

hello try this may need some refinement for the initial guess for the parameters depending of your data a = 0.55; m = 1....

9 giorni fa | 0

Selecting two values of an array randomly and reversing the values between

hello try this the output has values between 2nd and 5th data flipped n = 10; A = (1:n) % array ind1 = 2; % first inde...

9 giorni fa | 0

How to calculate mean within a for Loop

hello you have to index your output (mean_numerically(n)) , otherwise it get's overwritten at each iteration for n=1:length(b...

12 giorni fa | 0

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Rotate set of data points

hello see below the home made solution performs better than built in detrend matlab function (even with 'linear' argument) ...

15 giorni fa | 0

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Further processing of contour plot data

hello maybe this ? clc,close all clearvars N = 100; % <= added x = linspace(-pi,pi,N); y = linspace(0,2*pi,N); [X,Y] ...

16 giorni fa | 1

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Find specific area of a rotational speed curve

hi Konrad tried a few things first I think you could drastically reduce your sampling rate by a factor 1000 ! this graph do...

17 giorni fa | 1

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How to plot the mean value of X corresponding to each Y value?

hello yes i'm coming late in the show... nevertheles I am here !! just for the fun and FYI your data could be decimated up t...

17 giorni fa | 0

Can someone help me with codes or function combination to evaluate the Average force from tdms file with four channels? Pls, see codes I applied "manually" to attempt it.

Ok so this is what I can offer you today 1/ I noticed your sampling rate could be much lower (at least factor 1000) without an...

17 giorni fa | 0

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correlated interference related to gaussian autoregressiv

hello weel, you where not very far from the code.... here is it NB that the for loop start at indice 3 because matlab work...

17 giorni fa | 0

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Why is there a diiference in state-space velocity and derivative of state space displacement?

hello where do you see a difference ? diff or gradient based dispkacement derivatives do pretty well overlay with computed...

17 giorni fa | 0

How to find the upper and lower curve from this binary image?

hi I really do not consider myself as an image processing guy but I wanted to try it so here we go .... see result below base...

17 giorni fa | 0

Matlab fitting method to optimize the SNR in the frequency response curve to identify high error frequencies

hello this will reduce your plot noise but maybe you should improve the measurement method first ? load('Noise.mat'); s...

17 giorni fa | 0

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finding new frequencies of a signal with respect to another and plotting

hello first a comment : not sure why your frequencies are all normalized by fs...i changed that in my code below you need to ...

17 giorni fa | 0

How to generate 6 cycle or 10 cycle hanning modulated tone burst excitation

hello try this all the best fsin = 100e3; % sine freq Fs = 100*fsin; % sampling freq dt = 1/Fs; duration = 0.2e-3; ...

17 giorni fa | 1

Averaging specific rows and specific columns in N by N matrix

hello you need somehow to split your 5 domains into separate arrays (like a cell array as below) then you can perform a for ...

18 giorni fa | 0

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Overlay plots of different angles of incidence.

hello a very simple modification of your code create one figure and use hold on to overlay the next plots % YOUR INIT SECT...

18 giorni fa | 0

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Use a for loop to find files in subdirectories for own function, and then extract data from .csv file

Hello I would suggest this code to find the files in each folder then you can introduce your own processing of the identifie...

18 giorni fa | 0

Identify number of arrays within each row of a cell

hello Alberto only one for loop needed (row direction) try this : load cell_A.mat [R,C] = size(cell_A); for k = 1:R % row...

19 giorni fa | 0

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Quickest way to do a bandpass filter?

Hello Louise welcome back and happy new year ! I made some speed comparison with your code and two other options using a butt...

19 giorni fa | 0

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Scaled Step Response & Scaled Ramp Response of Transfer Function

hello for linear time invariant systems , you can simply multiply the normalized output of step and impulse by your input ampl...

24 giorni fa | 1