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Yazan


Last seen: 4 maanden ago Active since 2020

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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...

4 maanden ago | 1 answer | 0

1

answer

Answered
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...

10 maanden ago | 0

Answered
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 ...

10 maanden ago | 0

Answered
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-...

10 maanden ago | 0

Answered
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...

10 maanden ago | 0

Answered
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...

10 maanden ago | 1

| accepted

Answered
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...

ongeveer een jaar ago | 0

| accepted

Answered
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 = ...

ongeveer een jaar ago | 0

Answered
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...

ongeveer een jaar ago | 1

| accepted

Answered
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 ...

ongeveer een jaar ago | 1

| accepted

Answered
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...

ongeveer een jaar ago | 0

| accepted

Answered
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)

ongeveer een jaar ago | 1

Answered
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 ...

ongeveer een jaar ago | 0

Answered
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...

ongeveer een jaar ago | 0

| accepted

Answered
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...

ongeveer een jaar ago | 0

Answered
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')

ongeveer een jaar ago | 1

Answered
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)

ongeveer een jaar ago | 0

| accepted

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

ongeveer een jaar ago | 0

| accepted

Answered
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...

ongeveer een jaar ago | 0

Answered
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...

ongeveer een jaar ago | 1

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Answered
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...

ongeveer een jaar ago | 0

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Answered
Please help: ' Dimensions of arrays being concatenated are not consistent'
clc, clear d = load('Data.mat'); idx_lheel_start = find(strcmp(d.data_raw2(:, 2), '"Left Heel"')); idx_lheel_end = find(s...

ongeveer een jaar ago | 0

| accepted

Answered
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 = [...

ongeveer een jaar ago | 2

Answered
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...

ongeveer een jaar ago | 0

| accepted

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

ongeveer een jaar ago | 0

Answered
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 ...

ongeveer een jaar ago | 1

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Answered
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...

ongeveer een jaar ago | 0

Answered
Comparing Audio Impulse Responses
More generally, I believe you're looking for a quantitative measure of similarity between functions. This is a large domain of r...

ongeveer een jaar ago | 0

Answered
How to tell/check existing categories in tall tables
Yes, there is a way. Use findgroups.

ongeveer een jaar ago | 0

| accepted

Answered
Replace NaN with median per column
clc, clear x1 = randn(5, 5); x1(randi(numel(x1), 1, 5)) = nan; x2 = fillmissing(x1, 'movmedian', size(x1,1)*2, 1); display...

ongeveer een jaar ago | 1

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