Rik

Last seen: Today | Active since 2017

E-mails with feedback/questions about FEX submissions are welcomed. In general I will post e-mails about Answers on the related page, unless there is good cause not to do so.

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Selecting a file to create a plot on MATLAB
You mean like uigetfile and prompt?

1 hour ago | 0

Answered
Is it possible to implement a GUI in a Matlab script?
For general advice and examples for how to create a GUI (and avoid using GUIDE), have look at this thread. It will show you dif...

11 hours ago | 0

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Sound files with 4 channels in MATLAB
S = load('handel'); new_y = repmat(S.y,1,4); size(new_y) Now you can no longer use the sound function, as that only supports ...

2 days ago | 0

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How to present this equation for plotting
You need either power or .^ (otherwise you perform a matrix power). So apart from that correction, either will work. I would ...

6 days ago | 0

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2012 and 2018 compatibility
It is not completely true that all code that runs without error on R2012a (or b) will run with the same effect on R2018a (or b)....

6 days ago | 0

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Why does subtracting '0' from an array of char appear to convert it to a numerical double.
The minus function is not really defined for char, so the operands need to be converted to a datatype that is supported. Since ...

6 days ago | 1

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Range variables callback issue
I fully agree with Stephen that you should not use global variables. There are more legitimate uses than eval, but not many. ...

7 days ago | 0

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How to change the symbol size of the legend
This is only possible by increasing the size of the markers themselves in the plot. If you don't want that, you will need to cre...

7 days ago | 0

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Copying files based on a text file from a source folder that contains multiple sub-folders to a destination folder
The readlines function will allow you to read a text file (storing each line as an element of a string vector). The functions...

8 days ago | 0

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How can I use a user define function (.m file) as the prob.objective
From what I can tell reading the documentation, the easiest way would be to use the <https://www.mathworks.com/help/optim/ug/fcn...

8 days ago | 0

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is it possible to create a matlab script directly from gui pushbutton events (kind of like command line history)?
If you don't use numbered variables, you can include an fprintf statement that will write a line to a text file. There is no aut...

8 days ago | 0

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Set at least two ticks on log scales in figures
I don't know if this is an acceptable solution for you, but you could query the current tick labels and take action in your code...

9 days ago | 1

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how to determine if vector of row times is within timerange?
The timerange datatype is really only intended to be used with timetables. Once you convert your dates to a timetable, you can u...

9 days ago | 1

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parfor loop output and input are not matched in order
I suspect the source of the problem is the interaction with the file system. You should consider generating a random file name ...

10 days ago | 1

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Answered
Try catch error 'Unrecognized function or variable'
The code in the try block will be executed normally. If any line results in an error, the execution will abort, and the catch bl...

10 days ago | 1

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FFT of EEG data
Are you sure your file is in the format this function expects? This is a good lesson for your own code: make sure to write docu...

13 days ago | 0

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Submitted

readfile
read any (text) file, either UTF8 or ANSI

14 days ago | 14 downloads |

Answered
how can I find distance between one base station and all the users separately?
You can use the hypot function to calculate the Pythagorean distance. Check the documentation to see if it allows array inputs. ...

15 days ago | 0

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I am currently a college student.
That is correct. You are no longer allowed to use the student license if you are no longer a student. If you become a student ag...

21 days ago | 0

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run matlab online platform
Perhaps you mean Matlab Online?

21 days ago | 0

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vpasolve all solutions?
There might be a direct way, but at the very least there is a workaround: Since you can specify an initial estimate, you can ...

22 days ago | 0

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How to solve numerically and find the smallest value?
You can supply an initial estimate or a search range to vpasolve, as its documentation explains: syms v L0 x x=2; A=sqrt(2)*x...

23 days ago | 0

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Answered
gunzip(url) function not downloading archived file properly.
The file itself is not publicly available without a login, and that is what matters. Using websave will not help, nor will using...

25 days ago | 0

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How to generate a random number from a matris
If you want to select a number randomly from Y, you can use randi directly to index: Y=randi([0,300],[1,500]); RandomScalar=Y(...

27 days ago | 0

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Undefined function or command newff
The newff function did indeed exist (in the Neural Network Toolbox). According to this answer it became obsolete in 2010, altho...

27 days ago | 0

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regexprep: Nested ordinal token not captured
I'm not entirely sure tokens can be nested (at least in the implementation that Matlab uses). You can also explore the output o...

28 days ago | 1

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Difference between CloseRequestFcn and DeleteFcn?
Summarizing what has been mentioned in comments so far: CloseRequestFcn The CloseRequestFcn responds to any calls to the close...

1 month ago | 1

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Answered
MATLAB benchmarks for i7-12700K vs i9-12900
That will depend on the exact code profile you're going to use. Some code benefits from multiple cores, some does not. Some comp...

1 month ago | 0

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binwidth is not working
You're just creating a variable. You do not use that variable as an input argument, or to modify the histogram object after you ...

1 month ago | 0

Answered
Create new data sheet from fprintf code outputs
Your loop is overwriting the variable every iteration. You should replace this: fds=[Name,FD] With this: fds=[fds;N...

1 month ago | 0

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