Community Profile

Yazan

Last seen: ongeveer 2 maanden ago Active since 2020

Matlabist

All

Content Feed

View by

Question

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 maanden 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...

8 maanden 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...

ongeveer een jaar 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 ...

ongeveer een jaar 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-...

ongeveer een jaar 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...

ongeveer een jaar 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...

ongeveer een jaar ago | 1

| accepted

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...

meer dan een jaar ago | 0

| accepted

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 = ...

meer dan een jaar 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...

meer dan een jaar ago | 1

| accepted

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 ...

meer dan een jaar ago | 1

| accepted

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...

meer dan een jaar ago | 0

| accepted

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)

meer dan een jaar 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 ...

meer dan een jaar 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...

meer dan een jaar ago | 0

| accepted

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...

meer dan een jaar 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')

meer dan een jaar 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)

meer dan een jaar ago | 0

| accepted

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

meer dan een jaar ago | 0

| accepted

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...

meer dan een jaar 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...

meer dan een jaar ago | 1

| accepted

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...

meer dan een jaar ago | 0

| accepted

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

meer dan een jaar ago | 0

| accepted

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 = [...

meer dan een jaar 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...

meer dan een jaar ago | 0

| accepted

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

meer dan een jaar 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 ...

meer dan een jaar ago | 1

| accepted

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...

meer dan een jaar ago | 0