n-D look up table editor - adding rows / columns

1 view (last 30 days)
Hello,
I would like to ask if there is possibility to edit look up tables in n-D size (3-D in my case)?
I have matrice 9x5x6 and i need to put these data to the 3-D lookuptable.
For 2-D LUT i found that it is possible to add rows and columns, but not in n-D.
Is there any easy way how to create table from excel data?
Thanks for your help
  1 Comment
Voss
Voss on 25 Feb 2022
It is possible to add new "slices" (i.e. 2D matrices) into a 3D array:
format compact
x = zeros(2,4,3)
x =
x(:,:,1) = 0 0 0 0 0 0 0 0 x(:,:,2) = 0 0 0 0 0 0 0 0 x(:,:,3) = 0 0 0 0 0 0 0 0
new_slice = ones(2,4);
x = cat(3,x(:,:,1:2),new_slice,x(:,:,3))
x =
x(:,:,1) = 0 0 0 0 0 0 0 0 x(:,:,2) = 0 0 0 0 0 0 0 0 x(:,:,3) = 1 1 1 1 1 1 1 1 x(:,:,4) = 0 0 0 0 0 0 0 0
That's a 2-by-4 matrix of all ones being inserted at index 3 in the third dimension of x. You can just as easily insert 2D matrices into a 3D array in any dimension, if the sizes are the same in the other dimensions.
Is this the kind of thing you're asking about?

Sign in to comment.

Answers (0)

Products


Release

R2021b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!