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Susan

Last seen: 2 mois il y a Actif depuis 2020

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Question

Error on saving .fig files
Hi All, I have a nested for loop, and at the very last for loop, I plot the data and save them as a ".fig" in a folder. It work...

11 mois il y a | 1 réponse | 0

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Question

How to calculate the duty cycle of a time signal in a for loop?
Hi All, I have multiple time signals and like to compute their duty cycles automatically within a "for loop". For example the d...

12 mois il y a | 1 réponse | 0

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Question

How to solve an equation contains norminv?
Hi all, I'd like to solve the following equation. sol = []; for L = -20:10:120 syms x eqn = 10*log10(10.^(0.1*(nor...

12 mois il y a | 1 réponse | 0

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Question

How to align multiple signals?
Hi Matlab experts, I'm trying to align these signals but have yet to be successful. The signals are attached. They are periodi...

environ un an il y a | 2 réponses | 0

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Question

How to measure any disturbance in a signal that is exceeding a threshold?
Hi, Assuming having a noisy signal as attached, I'm interested in measuring any disturbance that exceeds a threshold, i.e., 0.1...

environ un an il y a | 1 réponse | 0

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Question

How to get the spectrum plot of a 5G NR signal generated by MATLAB?
Using the 5G NR signal generator, I generated a signal and then exported the MATLAB script. Then I ran this script, hoping I'd ...

environ un an il y a | 1 réponse | 1

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Question

How to remove/add elements to an array?
Hi All, I have a 115x1 vector, say A which is attached, that I'd like to remove the elements that satisfy some conditions and ...

environ un an il y a | 2 réponses | 0

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Question

How to find the QRS complex for this ECG signal?
Hi all, Could somebody please tell me how I can find the QRS complexes of this ECG signal? The signal is attached. Thanks in a...

environ un an il y a | 1 réponse | 1

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Question

How to create a polar plot?
Hi All, I have a signal (a complex tall vector) and I'd like to creat polar plots of it with a line connecting points that are ...

plus d'un an il y a | 1 réponse | 0

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Question

How to replicate the same graph using "Time scope"?
Hi All, I've got a question about the "Wireless Waveform Generator" app and "Time Scope," and your help is much appreciated. U...

plus d'un an il y a | 1 réponse | 0

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Question

How to chop up/segment a periodic signal?
I have a normal EKG signal (a periodic signal), and I 'd like to automatically chop up the signal into individual cycles (contai...

plus d'un an il y a | 1 réponse | 0

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Question

How to calculate the small changes in a signal?
Hi all, I have an ECG signal and would like to know what minor amplitude changes I can recognize. The goal is to see if I'm abl...

plus d'un an il y a | 2 réponses | 0

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Question

How to calculate the peak-to-peak amplitude of a waveform?
Hi All, Sorry if I’m asking about the obvious, but could somebody please tell me how to calculate the peak-to-peak voltage of t...

plus d'un an il y a | 2 réponses | 0

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Question

How to expand a waveform on x-axis?
Hi All, I want to expand a waveform on the x-axis. Specificlly, in the following fig, I would like to expand a waveform in such...

plus d'un an il y a | 1 réponse | 0

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Question

How to find a pattern in an array?
Hi All, I have an array (attached) and I'd like to find where a specific pattern happens in the array. I know that by knowing ...

plus d'un an il y a | 1 réponse | 0

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Question

How to read a .dat file containing an ECG signal?
Hi, I have an ECG signal contains data collected from 12 leads, saved in a .dat file (attached here). Could someone please hel...

plus d'un an il y a | 1 réponse | 0

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Question

Error using trainNetwork (line 184)
Hi All, I am trying to classify sequence datasets using deep learning by applying net = trainNetwork(XTraining,YTraining,layer...

presque 2 ans il y a | 1 réponse | 0

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Question

How to plot the amplitude ratio and phase differences for two time series signals ?
Greetings, I'd like to plot the amplitude ratio and phase differences of two signals. I used the following code to calculate ...

environ 2 ans il y a | 1 réponse | 0

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Question

How to remove outliers and smooth the complex signals?
Hi there, I am working on a complex data set-- a 300-by-1000 matrix which each element is a complex number and each column of t...

plus de 2 ans il y a | 2 réponses | 0

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Question

How to load .mat data from another folder?
Hey, I have several mat files located in a folder called "matFile". the script is located in the uperfolder of this matFile fol...

plus de 2 ans il y a | 2 réponses | 0

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Question

Could somebody please help me with Object-Oriented Programming in MATLAB?
Hi All, I am working on a script that call a "classdef" function and I need to have access to a value in this "classdef". Could...

plus de 2 ans il y a | 1 réponse | 0

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Question

Customizing the tick values and labels along x axis
Hi All, When I plot(1:20, f), the x-axis are shown from 1 to 20. However my real x values are x = Columns 1 through ...

plus de 2 ans il y a | 1 réponse | 0

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Question

How to define both integer and decimal increment in one for loop?
Hi all, I would like to define one for loop that goes from 0 to 1 with an increment of 0.1 and then goes from 1 to 30 by an inc...

plus de 2 ans il y a | 2 réponses | 0

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Question

Why do I get 'Out of Memory' error?
Hi All, I have a dataset which contains 316663 cells, each cell contains either a 600-by-1 or a 300-by-1 matrix. I got the err...

plus de 2 ans il y a | 1 réponse | 0

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Question

How to create indices for the k-fold cross-validation?
Hi All, I'd like to create indices for the k-fold cross-validation using indices = crossvalind('Kfold',Labels,k); The "Label...

plus de 2 ans il y a | 1 réponse | 0

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Question

How to combine n cell arrays into one giant one?
Hello, I have a 12-by-190 cell array dataset, each contains either a 1-by-504 cell array or a 1-by-336 cell array. Each of thes...

plus de 2 ans il y a | 1 réponse | 0

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Question

kmeans clustering of matrices
Hi All, I have 12X190 cells. Each cell contains a complex matrix of size n*550 (assuming each row is an observation on 550 va...

plus de 2 ans il y a | 1 réponse | 0

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Question

How to calculate the duty-cycle of a WiFi signal in WLAN toolbox?
Hi All, I just checked out the BLE coexistence model with WLAN signal interference (https://www.mathworks.com/help/comm/ug/ble-...

presque 3 ans il y a | 1 réponse | 0

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Question

How to extract contents of multiple tar files in a loop?
Hello Everyone, I have multiple .tar.gz files that I'd like to extract contentes of them. For one file I use path = 'C:\Users\...

presque 3 ans il y a | 1 réponse | 0

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Question

How to access data in a cell array?
Hi, I have an 40*8 cell array, called Q. Each cell contains an 64×64×128 double matrix. I would like to have a foor loop on ...

environ 3 ans il y a | 1 réponse | 0

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