Research Assistant.

Department of Electrical and Computer Engineering

University of Virginia

Question

Reading the numeric columns from a mixed data type file

I have a file (attached below) output.mat I am trying to read the data but everytime I need to manually copy/edit and paste in ...

13 days ago | 1 answer | 0

Question

Copy and paste current MATLAB code in another folder

I want to make a copy of my current code in execution and paste it into a folder I specify. But I am not sure how to do that. Th...

1 month ago | 1 answer | 0

Question

How to modify few numbers in a random text file?

I am uploading a text file related to a model in an electronic simulator. How to modify the 4 parameters named with toxe = %1....

1 month ago | 1 answer | 0

Question

How is pspectrum() different from FFT() magnitude plotted in dB?

I am having difficulty in finding a high-resolution frequency spectrum even though I have a pretty large number of time domain d...

3 months ago | 1 answer | 0

Question

High resolution FFT from time domain data.

I have a very large time domain data with a lot of samples, but still I am not getting a good resolution in the FFT spectrum. Is...

3 months ago | 1 answer | 0

Question

Find peaks/valleys of a noisy signal

I have this signal which is noisy as well as it has too much data samples. When I try to find the peaks or valleys, it gives mul...

3 months ago | 2 answers | 0

Question

How to find the delta cycles (change in the number of cycles) in two sine signals with nearly identical frequencies?

I have these two signals generated from the following code; clc clear all close all %% f = 4000; t = 0:1e-5:50e-3; sig...

3 months ago | 2 answers | 0

Question

Finding first 5 maxima and its consecutive minima.

I have the signal in the plot which is zoomed in a time window to show the peaks. I want to find not only the maxima (I did th...

4 months ago | 1 answer | 0

Question

Create a binary matrix for more than 50 variables

I am not able to get the ouput for: dec2bin(0:1:2^no_of_variables-1) where 2^no_of_variables = 50 or more. This is because ...

4 months ago | 1 answer | 0

Question

How to make stack plot with y axis consisting of multiple plots?

I make the plots by the following code using subplots subplot(2,1,1) for i=2:size(data,1) plot_fig(i) = plot(data(1,:...

4 months ago | 1 answer | 0

Question

Can we save the table as delimited txt in a proper manner?

I am using the following command. writetable(T,'myData.txt','Delimiter',' ') However, the table doesn't get stored as nicely...

4 months ago | 0 answers | 0

Question

Dynamic variable names for MATLAB table

I am making the header names of the table as following: colnames = [arrayfun(@(x) sprintf('type%d', x), 1:size(all_sorted), 'Un...

4 months ago | 1 answer | 0

Question

How to take logical or of all the elements in the vector without a loop?

I am trying to use or(a(1,1):a(1,size(a,2))) but it doesn't run for more than 2 elements. also when I run or(1,1,0,0.1,0,...

4 months ago | 2 answers | 0

Question

Converting a variable sized cell array to a matrix

I have a cell as below: 5 -3 11 2 3 7 -9 7 -1 3 2 4 -4 ...

4 months ago | 1 answer | 0

Question

How to position the legend such that it is not over the plots and also how to make horizontal legends?

I am plotting mxn matrix (y-axis) with the mx1 vector (x-axis). However, the plot just looks bad for cases of more than 10 legen...

4 months ago | 1 answer | 0

Question

How to construct and evaluate a boolean expression using symbols?

If I have a boolean expression that is y = (x1bar∨x2)(x3bar∨x4bar)(x3bar∨x5) I am currently using a simple 1 and 0 matrix to ...

4 months ago | 1 answer | 0

Question

Can I make the matrix of size n with only x elements known and rest all 0?

I have a matrix that can have some x known values. But I want to make it of fixed length n. In other words, I want to append 0s ...

4 months ago | 2 answers | 0

Question

Is there a matrix which can be alphanumeric?

I am trying to make a matrix like 1n -1 1n 2 1n 1 1n 3 The first column is going to be concaten...

4 months ago | 1 answer | 0

Question

Is it possible to read a file line by line and then break each line into individual characters/numbers for further processing?

If I have a file with the folliwing contents: a file.dat a n pqr 3 2 1 -3 0 2 3 -1 0 Then is it possible to extract the nu...

4 months ago | 1 answer | 0

Question

MATLAB not using the RAM entirely. Is it because I have an academic license?

I have a big workstation with 256 GB RAM and 32 cores. The intention to buy this was to speed up the simulations. But, I just fi...

5 months ago | 1 answer | 0

Question

How to construct a large graph (~1e5) that has max, min, and avg degree using the logical sparse adj matrix that computes faster. Also, how to ensure that the graph is not broken (there are no subsets of disconnected graphs in the main graph)?

I have the following code for generating a small (~1e3) graph that I can control the degree of (code 1). This has n (number of n...

5 months ago | 0 answers | 1

Question

Generate a 100000x100000 matrix that takes less time and memory

I have written a random matrix generator code that generates an adjacency matrix of any size. I am targetting larger size like 1...

5 months ago | 3 answers | 0

Question

how to find fwhm using fwhm()?

I have a time domain data and also a FFT of this data. But when I use fwhm(x,y) then it says Pulse Polarity = Positive Pulse ...

5 months ago | 1 answer | 0

Question

dBc/Hz phase noise undefined function error?

I am trying to use phaseNoiseMeasure (https://www.mathworks.com/help/msblks/ref/phasenoisemeasure.html) function to find dBc/Hz...

5 months ago | 1 answer | 0

Question

How to display the filename correctly?

I am trying to export a figure with a file name that is derived from the string name after a section of a code. Below is the exp...

5 months ago | 1 answer | 0

Question

How to maintain uniformity in the xtick and ytick labels? Also, how to adjust the legend position in a non-interactive setup.

I have the below plot and I want to do the following changes. 1) If you see the horizontal spacing between tick and the plot i...

5 months ago | 1 answer | 0

Answered

How to plot the figure as equivalent to figure Picture1 below?

I got the solution. It is quite simple. I used export_fig function of MATLAB https://www.mathworks.com/matlabcentral/fileexchang...

How to plot the figure as equivalent to figure Picture1 below?

I got the solution. It is quite simple. I used export_fig function of MATLAB https://www.mathworks.com/matlabcentral/fileexchang...

5 months ago | 0

| accepted

Question

How to plot the figure as equivalent to figure Picture1 below?

I have a plotted figure in software called Origin. I used to use the EMF figures from Origin and import them into the PowerPoint...

5 months ago | 1 answer | 0

Answered

Problem Add-Ons Matlab 2016b

Please try to run the following in the MATLAB Command Window: >> opengl software And then try opening the Add on explorer aga...

Problem Add-Ons Matlab 2016b

Please try to run the following in the MATLAB Command Window: >> opengl software And then try opening the Add on explorer aga...

6 months ago | 0

Answered

Facing problem whenever try to access Matlab add-on explorer in 2017a

Please try to run the following in the MATLAB Command Window: >> opengl software And then try opening the Add on explorer aga...

Facing problem whenever try to access Matlab add-on explorer in 2017a

Please try to run the following in the MATLAB Command Window: >> opengl software And then try opening the Add on explorer aga...

6 months ago | 0