Apply function on layer of 3D Array
9 views (last 30 days)
Show older comments
Hello,
Assume I have the following 3D Array Hv:
v=reshape(rand(1,6),1,1,[]);
H=[1 0 0 0; 0 4 4 0; 0 4 4 0; 0 0 0 1];
Hv=bsxfun(@times,H,v);
I want to perform the operation expm() on each layer of Hv. So the output should be an array of the same dimension, with the expm(H) of every layer. I do not want to use a loop over the third dimension, and hope it is possible to perform the operation directly on the vector. I hope my question is understandable, I couldn't find a solution anywhere. Thanks alot.
3 Comments
Stephen23
on 11 May 2020
"I do not want to use a loop over the third dimension"
A loop is likely to be the fastest and most efficient solution. Why do you wish to avoid a loop?
Answers (1)
Monika Phadnis
on 11 May 2020
You can use 'arrayfun' function for your use case in the following way:
>> data_expm = arrayfun(@(i)expm(Hv(:,:,i)), 1:size(Hv,3), 'UniformOutput', false)
You can refer this answer for more information :
1 Comment
See Also
Categories
Find more on Creating and Concatenating Matrices in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!