# how to convert 4D into 3D?

31 views (last 30 days)
mohd akmal masud on 30 Jul 2022
Edited: mohd akmal masud on 31 Jul 2022
Dear all,
the name file is LiverTS399.mat
how to convert it into 3D?
I tried use this command, but still 4D in workspace
split = squeeze(cropVol);

Walter Roberson on 31 Jul 2022
split = reshape(cropVol, size(cropVol,1), size(cropVol,2), size(cropVol,3)*size(cropVol,4));
This would give you a 3D volume in which the 4th dimension has been spread out onto the third dimension.
or perhaps you want
split = squeeze(num2cell(cropVol, [1 2 3]));
This would give you a cell array in which each element was a 3D slice.
mohd akmal masud on 31 Jul 2022
Edited: mohd akmal masud on 31 Jul 2022
this is correct
split = reshape(cropVol, size(cropVol,1), size(cropVol,2), size(cropVol,3)*size(cropVol,4));
thank you so much @Walter Roberson
but the real size is [184 192 152] but I got is [184 192 608]
I try use this one but got Error
split = reshape(cropVol, size(cropVol,1), size(cropVol,2), size(cropVol,3));
Error using reshape
Number of elements must not change. Use [] as one of the size inputs to automatically calculate the appropriate size for that
dimension.

Matt J on 31 Jul 2022
If you mean you want the i-th 3D frame of the 4D data, then,
frame_i=cropVol(:,:,i)
mohd akmal masud on 31 Jul 2022
Edited: mohd akmal masud on 31 Jul 2022
thank you @Matt J
I use
frame_i=cropVol(:,:,:,4)
then give what I want

### Categories

Find more on Image Segmentation in Help Center and File Exchange

R2022a

### Community Treasure Hunt

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

Start Hunting!