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Rik


1,599 total contributions 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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Answered
Divide the matrix randomly, based on columns
You mean like this? fractions=[70 15 15]; x=rand(78000,100);%use 100 to show the split is indeed 75:15:15 groups=cell(size(...

1 day ago | 0

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Answered
Looping Factorial that adds successive terms
You should have just shown the last line. I first spent quite some time finding the correct method of implementing your non-desi...

2 days ago | 0

Answered
Can someone give an easy explanation for what hObject is and what handles is in MATLAB GUI?
In GUIs that are generate by GUIDE, every callback has 3 arguments: hObject: the handle to the object that generated the callba...

3 days ago | 1

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Answered
Lookup-scheme for potentially large n choose k matrices
If the citeria below are satisfied, you can use memoize: Performance is important. The function is time consuming. The functi...

3 days ago | 1

Answered
Name arrays based on a variable
The reasons why naming variables dynamically can be found here. It sounds like you are looking for the features a struct will pr...

3 days ago | 0

Answered
To make coding simplier and have the same plot
You could vectorize this, but using a loop is much easier and will probably have the same performance. Here is an example for t...

3 days ago | 0

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Answered
Matching X and Y co-ordinated from the reference xy
Although you can solve this with the ismember function, you are actually looking for the intersect function: X = [1,2,3,4,5,6,7...

3 days ago | 1

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Answered
Passing array between GUI callbacks
This is in broad strokes how you can use getappdata and setappdata. h_fig=figure; %in your startup/constructor function: A=...

3 days ago | 0

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Answered
I want t know if cell is contained in another cell?
The input to cellfun must be a cell, which will be unwrapped before handing it to the function. You als have curly brackets arou...

4 days ago | 0

Answered
how to switch the values of a variable
I guess boldly: This is probably your current code: figure(1),clf(1)%don't forget clf during debuggin array=[1 2 3 5 7]; x=l...

7 days ago | 0

Answered
What does the 'imfuse' output mean?
The output is an image. If you don't understand a function reading its documentation is an excellent start. Here is a link to th...

7 days ago | 1

Answered
So let's say I have a 3 row, 3 column matrix. If I code the following:
The documentation explains what the second input does. One of the advantages of Matlab over their competition is the documentati...

8 days ago | 0

Answered
How to plot a temperature in xy axis (2D temperature contour)?
The surf function expects a matrix, so you will have to convert your linear data to a matrix. The accumarray function is a very ...

8 days ago | 0

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Answered
If I have an older version of Matlab can it be upgraded to a newer version like 2015 for free?
You can update to whichever release your license entitles you. This is different for different licenses. The download center sho...

9 days ago | 0

Answered
How to calculate mean of output in a for loop?
If you want to calculate the mean and the variance you will have to store the output. Since you know the number of iterations, y...

9 days ago | 0

Answered
Is there anyway to convert GUI to .exe without using MATLAB Compiler ?
I am not aware of any method outside of Compiler that will allow you to do that. The only 'alternative' I know is using GNU Oct...

9 days ago | 0

Answered
best option for storing metadata associated to each data file
Another way of thinking about metadata is that it is data itself. Store it as a separate plain text file with the exact same nam...

10 days ago | 0

Answered
saving multiple .mat files with the same name from a script
Use sprintf to form the file names with a number. During the loading, you should load to an output variable and store all the...

10 days ago | 0

Answered
Few questions in matlab assignment
If you paste your code in the Matlab editor you will see two mlint warnings and one error. The first warning is that V is not d...

12 days ago | 0

Answered
How to separate values of string input into other variables???
I'm puzzled why you would want this. The cause of your issue is that you aren't clear about your data types. The char array in f...

13 days ago | 0

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Answered
Get Matlab R2019b as default program to open .m files on Windows 7
You can select the 'matlab.exe' file in the folder below: C:\Program Files\MATLAB\R2019b\bin\win64 That should make it show up...

13 days ago | 0

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Answered
How can i calculate the center of mass ?
You can use the VOXELISE function to convert your mesh to a voxelgrid. Use a resolution that makes the most sense to you: too fe...

14 days ago | 0

Answered
How to write low level text to a file without interpretation
If you want to write a char array, you should use the fprintf('%s', txt) syntax, otherwise fprintf will interpret your input as ...

15 days ago | 0

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Answered
How to write this equation?
There is a difference between log and log10. What you have done in Excel is actually calculate the log10, because you omitted th...

16 days ago | 2

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Answered
MATLAB Answers Wish-list #5 (and bug reports)
Another nice-to-have feature: being able to move threads between the answer section and comments without having to repost them. ...

16 days ago | 0

Answered
Creating a seperate high score file for Matlab game
There are several options to store data. If you need to store it in a file you can either use a mat file (with the save and load...

17 days ago | 0

Answered
Managing maximum and minimum values ​​in the elements of an matriz.
This should work. The idea is to first find out the base number, adjust the offset if needed, and add the base back. A = [2.1 ...

17 days ago | 0

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Answered
Compatibility : get the Matlab minimum version required to run a program
The only reliable way I have found is to actually test it. An alternative is to carefully read the documentation of every functi...

17 days ago | 0

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Answered
How to create a custom matrix?
This is a simple contatenation: n=8; %generate W and V W=randi(20,n,n); V=randi(5,n,3); output=[zeros(n,3) ; W*V];

17 days ago | 1

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Answered
Close all figures which are not docked
Using the script below I generate the list of properties that are different between docked and undocked figures. After running t...

17 days ago | 2

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