How to calculate the width where the intensity is higher than 20% of the maximum intensity?
hello Angelo I have no doubt you can use findpeaks but sometimes I prefer my own way. see demo below - this is to find W20...

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how harmonic estimation using DFT ?
hello yu can take example on the code below (averaged fft spectrum and spectrogram (this my not be your main focus right now))...

Math Moron here in need of a function to simulate a degrading curve over time.
hello maybe this ? (the idea behind is a sigmoid) samples = 100; c = samples/2; % center of the curve (c corresponds to ...

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How to extract column in particular interval from original matrix and to form new matrix?
hello I guess you mean you want to downsample your data by a factor 4 ; you can of course simply pick one every four sample , ...

Variable vs constant frequency analysis
hello see my little demo below - no need for fft , I simply compute the cycle by cycle period (by crossing detection) on two s...

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i need to find error in code because I it's increasing but it should be decresing
hi seems you have swapped the x and y data when you do the plot after the fix we get this : full code a bit improved : ...

what's the code inside angle2dcm?
hello here you are notice that there are some issues / questions about orientation convention with this function angle2dcm3(...

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Issue with magnitude of cumtrapz and integration of second order system acceleration data
hello accelerometer's signals double integration can be a bit tricky. We must compromise between being as accurate as possible...

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Read the third column of a .csv file
hello you can use the import wizard to help you create the right import options for readtable see demo below - temperature is...

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Plot two figures simultaneously
hi my suggestion with subplots close all clear all clc format long %% Data Layup Layup = [90 0 0 45 -45 0 0 -45 45 0 0 9...

I need help plotting
hello this is the correct code Uan and Uab needs to be 2D arrays (n rows and columns as many as length(t)) also some missin...

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Plot spectrogram plot just like pre 2015
hello specgramdemo was a really nice piece of code. It will be quite serious work to rebuild the whole thing otherwise , att...

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Extract maxima of a fitted curve
hello your code cannot be run because you did not provide prepareCurveData function and the data U_axis, U [xData, yData] =...

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impulse response with the commande lsim
hello your first implementation is a discrete time impulse For discrete-time systems, the impulse response is the response to...

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How to load multiple files and calculate value for each file (with same formula)
hello this is the code (principle) to load all the mat files in a loop % use the structure returned by DIR: P = cd; % worki...

i have a single row vector contains 0s and 1s and want to convert every 3 bits into integer how can i do that??
hello see below hope it helps % dummy data nbits = 3; samples = 8; x = round(rand(1,nbits*samples)); nbits_vect = 2....

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How to read a text file and save it as different variables
hello I saved you short text from the post in a file and started some coding nota this code contains also an alternative to ...

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Hello I need a code that gives me the local minimum of a histogram please ?
hello maybe this the local minima are the red diamonds x = randn(1000,1); h = histogram(x); Values = h.Values; Bin...

Generating spike using decaying exponential sinusoid of frequency 10^7Hz
hello try this code ; I guessed the pattern period about 0.01 second but you can of course modify it Fs = 1e7; dt = 1/Fs; ...

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How to plot data for hundreds of rows in MATLAB?
hello mamma mia ! You are not using matlab capabilities to do math on arrays ... there is much simpler ways to do all this stu...

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How to add the signals according to time?
hello try this (i made a few mods , see the comments) clc; close all; clear all; % In one x axis, from 0 to 0.3 seconds...

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Put cell array data into txt file
hello try this % writing dates to output file fid = fopen('output.txt','w'); fprintf(fid,'%s\n',H{:}); fclose(fid); % ch...

How to loop multi-line with data text?
hello again try this code - does not require readlines line_index will give you which line contains the searched string filen...

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How to count active faults in a specific time interval
hello try this code ; it select segments of data above a given threshold and longer than min_contiguous_samples samples; %...

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full width, half max
hello the attached code can work but is limted in terms of accuracy (will depend how fine is sampled the data) I would sugges...

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Pcolor of a time-series
hello I suspect this is the intention - demo on "dummy" data % dummy data dt = (1:3285)'; data1 = single(rand(3285,1)); ...

Fourier Analysis on a Damped Harmonic Oscillator
hello I improved a bit the firts section of your code but I don't get what you are trying to do wit the second portion of the...

Why is my projectile motion code only working at certain input angles.
hello made a for loop on angles to test the code (for one given V velocity) and it worked as soon as I put the "clear x y" li...

Transform rows to columns and add them at the end
hi simply this : >> a = [1 2 3 ; 4 5 6; 7 8 9]; >> a(:) ans = 1 4 7 2 5 8 ...