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Yazan

Last seen: 2 months ago Active since 2020

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Distinguishing between boards based on connection type
Hi all, I have two development boards that I can connect to using Matlab. One uses a USB connection, while the other one an Eth...

3 months ago | 0 answers | 0

0

Question

Inaccurate results when writing xls through writetable
Hello everyone. I am using Matlab R2021b. I write then save .xls files from a table using writetable. After saving, I write aga...

9 months ago | 1 answer | 0

1

Find the Averaged periodogram
You need to use Welch’s method for power spectral density estimation. Read the details here, and see the demo below. clc, clear...

1 year ago | 0

How can applied FrFT of an ECG signal estimated as discrete fractional Fourier transform based on Eigen decomposition?
To compute the FrFT, you may use this contribution (I haven't tested myself). If you need the computation to be performed based ...

1 year ago | 0

Hello guys, i need help for estimating FAR from this formula can review my code please
Have you noticed that the distributions defined in your codes are not Gaussian? See the demo below mu = 3; sigma = 1; x = mu-...

1 year ago | 0

How to do a hankel transform on a matrix in Matlab?
The Hankel transform (HT) of a vector is a vector and of a matrix is, naturally, a matrix. You mentioned that in your applicatio...

1 year ago | 0

Docked figures tabs postion from top to left in code?
f = figure; tg = uitabgroup(f, 'TabLocation', 'right'); tab1 = uitab(tg, 'Title', 'Figure 1'); tab2 = uitab(tg, 'Title', 'Fig...

1 year ago | 1

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what does this Complex values are not supported mean?
tetagrados is a vector of complex numbers. So, first of all, notice that the function plot throws a warning and plots only the r...

1 year ago | 0

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How do I sort files by part of their filename?
You can use the following to search for files in the current folder that have a specific name format: P = dir('*I=0.5') % P = ...

1 year ago | 0

Invert a histogram by emphasizing on the valleys
One way to do that probably is by subtracting the rate in each bin from the maximum rate. Below is an example with normal distri...

1 year ago | 1

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How to denoise chirp signal in low SNR condition with NLMS or any other methods?
As I mentioned in my comments to your question, it is recommended that you experiment with some state-of-the-art time-frequency ...

1 year ago | 1

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How to find the maximum of peaks ?
Below, I am proposing an implementation of what I understood to be your task. You have to experiment with the findpeaks multiple...

1 year ago | 0

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Making a matrix of R*C size that takes the values randomly from an array- Y.
i1 = 7; i2 = 8; y = [1 6 1 8 4 5]; randIdx = randi(length(y), 1, i1*i2); data = reshape(y(randIdx), i1, i2)

1 year ago | 1

How can I interpolate rows in an array with a loop?
if A is an array, then Matlab will throw an error, as you are using curly braces for indexing. Below is a demo on how to user ...

1 year ago | 0

maxk from subset of array
clc, clear v = [10,22,3,-5,8,6,100,30,12,9]; subIdx = [1,3,5,8]; k = 2; % sort values and get corresponding indices [v...

1 year ago | 0

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How to remove empty line from struct?
D.f1 = [1 2 3 4 5]; D.f2 = []; % structure with 2 fields D % get fields fields = fieldnames(D) % remove empty fields...

1 year ago | 0

Count the number of times a word appears?
A = {'fishX', 'fishY', 'fishZ', 'fishX', 'fishX'}'; B = [3 3 2 2 2]'; T = table(A, B); groupsummary(T, "A", 'sum')

1 year ago | 1

how to recognize if an element of a cell array is a char vector
c = {'name', 'John Smith'; 'age', 32; 'children', cell(1,2)} cellfun(@ischar, c)

1 year ago | 0

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Creating a mesh in a 3-d plot.
clc, clear, close all opts = detectImportOptions('Data1.xlsx'); opts1 = detectImportOptions('Data2.xlsx'); % Load data ...

1 year ago | 0

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Linear interpolation two array with target value in one array
Try this clc, clear A = [483, 427, 306, 195]; B = [0, 0.25, 0.5, 0.75]; % assume that these are your target values targ...

1 year ago | 0

I need help with converting hourly data to daily summation inside a cell
Note that the data type in the column date is char, not datetime. Try the following: clc, clear load('example.mat'); data...

1 year ago | 1

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Struggling to create STFT form FFT
There are several open-source Matlab-based time-frequency toolboxes, which all provide implementations of the STFT. Check some o...

1 year ago | 0

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clc, clear d = load('Data.mat'); idx_lheel_start = find(strcmp(d.data_raw2(:, 2), '"Left Heel"')); idx_lheel_end = find(s...

1 year ago | 0

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Finding Impulse response of LTI system when input signal and output are given.
Below is a code that estimates the impulse response with 3 equivalent approaches: clc, clear inpSig = [1 1 1]; outSig = [...

1 year ago | 2

How to add a new array in the structure?
clc, clear vehicle.genset_model.drag = [4; 5; 6; 7; 8; 9; 10]; % save structure array in 'data.mat' save('data.mat', 'veh...

1 year ago | 0

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create all logic permutation array
d = (1:2.^3-1)'; b = de2bi(d); b

1 year ago | 0

Time resolution of Spectral Entropy - How could I modify it?
You need to provide the spectrogram to the Matlab function, and this spectrogram should have your desired time resolution. See ...

1 year ago | 1

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FFT of quantized signal
There are some issues with your code. See my modifications and comments below. You cannot calculate SNR, because you did not add...

1 year ago | 0