# Susan

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**Content Feed**

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...

8 days ago | 1 answer | 0

### 1

answerQuestion

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...

22 days ago | 1 answer | 0

### 1

answerQuestion

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...

1 month ago | 2 answers | 0

### 2

answersQuestion

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...

2 months ago | 1 answer | 0

### 1

answerQuestion

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 ...

2 months ago | 1 answer | 1

### 1

answerQuestion

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 ...

3 months ago | 2 answers | 0

### 2

answersQuestion

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...

3 months ago | 1 answer | 1

### 1

answerQuestion

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 ...

4 months ago | 1 answer | 0

### 1

answerQuestion

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...

5 months ago | 0 answers | 0

### 0

answersQuestion

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...

7 months ago | 1 answer | 0

### 1

answerQuestion

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...

7 months ago | 2 answers | 0

### 2

answersQuestion

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...

7 months ago | 2 answers | 0

### 2

answersQuestion

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...

7 months ago | 1 answer | 0

### 1

answerQuestion

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 ...

7 months ago | 0 answers | 0

### 0

answersQuestion

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...

8 months ago | 1 answer | 0

### 1

answerQuestion

Error using trainNetwork (line 184)

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

1 year ago | 1 answer | 0

### 1

answerQuestion

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 ...

1 year ago | 1 answer | 0

### 1

answerQuestion

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...

1 year ago | 2 answers | 0

### 2

answersQuestion

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...

1 year ago | 2 answers | 0

### 2

answersQuestion

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...

1 year ago | 0 answers | 0

### 0

answersQuestion

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 ...

1 year ago | 1 answer | 0

### 1

answerQuestion

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...

1 year ago | 2 answers | 0

### 2

answersQuestion

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...

2 years ago | 1 answer | 0

### 1

answerQuestion

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...

2 years ago | 1 answer | 0

### 1

answerQuestion

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...

2 years ago | 1 answer | 0

### 1

answerQuestion

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...

2 years ago | 1 answer | 0

### 1

answerQuestion

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-...

2 years ago | 1 answer | 0

### 1

answerQuestion

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\...

2 years ago | 1 answer | 0

### 1

answerQuestion

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 ...

2 years ago | 1 answer | 0

### 1

answerQuestion

How to combine several cell arrays into one cell array?

Hello every one, I have 4 cell arrays as given below H = 20*4*4 cell array G = 40*8*4 cell array Q = 20*4*8 cell array w...

2 years ago | 0 answers | 0