Mathieu NOE

Hutchinson

Last seen: en dag ago | 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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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 ...

en dag ago | 0

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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...

en dag ago | 0

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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 ...

en dag ago | 0

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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...

3 dagar ago | 0

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

4 dagar ago | 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 :...

6 dagar ago | 0

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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...

6 dagar ago | 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...

6 dagar ago | 0

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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]; ...

9 dagar ago | 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 =...

10 dagar ago | 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....

10 dagar ago | 0

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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...

10 dagar ago | 0

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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...

13 dagar ago | 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) ...

16 dagar ago | 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] ...

17 dagar ago | 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...

18 dagar ago | 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...

18 dagar ago | 0

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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...

18 dagar ago | 0

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Answered
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...

18 dagar ago | 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...

18 dagar ago | 0

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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...

18 dagar ago | 0

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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...

18 dagar ago | 0

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Answered
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 ...

18 dagar ago | 0

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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; ...

18 dagar ago | 1

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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 ...

19 dagar ago | 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...

19 dagar ago | 0

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Answered
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...

19 dagar ago | 0

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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...

20 dagar ago | 0

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Answered
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...

20 dagar ago | 0

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Answered
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...

25 dagar ago | 1

Mathieu NOE

Hutchinson

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