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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Plot with dot notation as an updating variable
You painted yourself in a corner when you decided to store data in variable names. However, you can still use your mat files. Yo...

2 days ago | 0

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matlab coding how to do this?
doc input doc if

3 days ago | 0

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Problem in calculating 30th percentile
Write a function that calculates the 30th percentile for a vector. Then provide the handle to that function to splitapply. Th...

6 days ago | 0

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On the app designer, how can i log data in real time to a .mat/.txt file
This sounds like you could solve it by using one of the append flags when using fopen. Then you can fprintf what you need to wri...

7 days ago | 0

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Loading multiple data folders and call them in a For Loop
Your mistake was in your naming of the variables. If you can guarantee they are always integers, you can do something like this ...

8 days ago | 0

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find, change and plot a txt file
Break it up into tasks you either know how to do, or for which you can google a solution. So first: how can you read a text fil...

8 days ago | 0

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How can I change the upper case letters in a string to lowercase while also changing the lowercase letters to uppercase?
No need for a loop. There are three 'types' of characters that are potentially in your string: Upper case characters Lower ca...

8 days ago | 0

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How to change format time to GPS week, GPS seconds?
The start date of this GPS epoch is probably on Wikipedia. You can simply subtract that date from your date. Then you calculate...

8 days ago | 0

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Bunch of Errors with Matlab GUI
GUIDE is infamous form auto-generating a lot of bloat. Let's first remove all that (and the init function, since that is the sam...

8 days ago | 0

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Marker edges, line width and legend
Or you use a line object without any points to get the legend entry you want: xx=linspace(0,12); plot(xx,sin(xx),'LineStyle','...

10 days ago | 0

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Can I use a variable name to make logical comparison?
You could use the string datatype (as Chunru suggested), or use a cellstr (a cell array of char vectors): %month = input('Enter...

12 days ago | 1

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(Need Help) Is fmincon command available for the embedded coder?
There is a section at the bottom of the documentation page of fmincon that lists limitations for code generation. This section ...

12 days ago | 0

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Load and display bitmap file using Fread
You should reshape the data, not the fid. To remove the first 54 bytes you can use fseek, or just skip it from your array: ...

14 days ago | 0

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How to get rid of green marker/arrow?
This looks like the pointer that indicates where your code execution has paused so you can step through the code. If so, you sho...

14 days ago | 1

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Answered
How to plot audiofiles in Vertically
There is no VerticalAlignment property for uicontrol objects (neither in R2018a or R2021b). A center alignment is the default. F...

18 days ago | 0

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reading the data with title
Any Google search for 'read text file matlab' should provide you with an answer that works. What I personally use is my readfile...

18 days ago | 0

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New to matlab. Why i get this answer?
syms y(t) yef(t); ymax=120*0.40680; yef(t)= 0.95*(1/(1+(y(t)/ymax)*y(t)+(1-(1/(1+(y(t)/ymax))*ymax)))); yo=0.40680*140; k10=...

19 days ago | 0

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Answered
Deleting certain elements from an array without looping
The code Chunru wrote will work, but I have a few suggestions. Instead of using length, you should consider using numel as a ha...

19 days ago | 1

Answered
overlay bar plot without mixing color
Here is my solution, which allows you to specify the 3 face colors separately: A = [1;5;3;7;4]; B = [3;2;4;8;2]; shared=min(A...

19 days ago | 1

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Answered
How do you create an array of date times given a starting date and number of days?
Vector1=1:5; Datetimevector = datetime(1900,1,1)+days(1:numel(Vector1))

22 days ago | 0

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How to view a mat file that says preview too large to display Properly in Import Wizard
A mat file is a file, not a variable. It may contain variables. Judging from your description it only contains a single variable...

23 days ago | 0

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I not able to understand what type error I am making in the while loop
You aren't updating the value itself, so the calculation is the exact same on every iteration. function out = babyloniansqrt(S,...

23 days ago | 0

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Looking for alternative of extractBetween function
You need to come up with a regular expression that will exactly match what you want to extract. Below is my guess for what you w...

23 days ago | 1

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What frustrates you about MATLAB? #2
Posted by @stephen williams on the original thread: The symbolic toolbox seems to have a lot of power, but it is not user frien...

24 days ago | 1

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What frustrates you about MATLAB? #2
Posted by @Osmar Tormena Júnior on the original thread: I understand that being a Mac user I'm in a niche position. But I find ...

24 days ago | 0

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How to create an interactive menu in the command window?
doc input Although in general a GUI will be nicer for your user. For general advice and examples for how to create a GUI (a...

28 days ago | 0

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Creating a new table column that is the range of numbersbetween two other column
You can either use a loop, or hide the loop with rowfun: data=[54 119 60 129 177 119 183 129 ...

30 days ago | 0

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How to increase the efficiency of this MATLAB program by using vectorization techniques
Arrayfun will only hide the loop, so it will never be faster than a plain for loop. What you need to do is change your function...

1 month ago | 0

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c++ programming.
You forgot two things: This is a Matlab forum and nothing in your question is related to Matlab Every line should end with a s...

1 month ago | 0

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char array to cell array convert?
If you want to round your data, just use round: T = {[5.8882656], [0.01232356], [0.02556545],[0.035659595]}; T = cell2mat(T); ...

1 month ago | 0

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