concat of 3d mat files in a folder

i have 20 3d mat files in a folder and i have different sizes for each ex: 512*1024*128 668*512*64 512*512*49 etc all i need is to load these data then resize the first two dimensions to 512*512 and to make one mat file for all can anyone help me please

[Jan]

What exactly is a "3D mat file"? How are the files identified? Do they have a pattern in the file name or are they all files in a folder? How do you want the 20 resulting array to be stored in a file? As cell array?

[khaled alsaih]

so with the example above th final matrix for the 3 512*512*241

[khaled alsaih]

ex: first mat file have the size 512*1024*128 second mat file have the size 668*512*64 and the third is 512*512*49 so after resizing the first two dimensions to 512*512 and the third dimension represent number of images and loading the mat files should give us 512*512*241

[Jan]

If you want to use a loop, how are the wanted files recognized? We cannot guess, which 20 files you want. But a meaningful example code must contain a method to determine the files. So please reveal the details.

[khaled alsaih]

i have 20 (3d) images 7 images have the size of 512*1024*128 and 7 images have the size of 668*512*64 and 6 images have the size of 512*512*241 i want to load the data in the directory then resize all images to 512*512 then cocatenate them in one mat file

Answer 1

[Jan]

With a loop:

Folder = 'C:\Your\Path';  % Adjust the path to your needs
List   = dir(fullfile(Folder, '*.mat'));
C      = cell(size(List));
for k = 1:numel(List)
  Data = load(fullfile(Folder, List(k).name));
  M    = Data.??? % Unfortunately you do not reveal what in the MAT files is.
  % Perhaps:
  % M = Data.Value;
  C{k} = imresize(M, [512, 512]);  % See KSSV's answer
end
Result = cat(3, C{:});
save('Output.mat', 'Result');

[khaled alsaih]

hello friend the data is 3d image where 512 1024*128 is height *width depth

[khaled alsaih]

by the way the data is unit8

[khaled alsaih]

thanks a lot for your help bro

Answer 2

[KSSV]

A = rand(512,1024,128) ;
B = rand(668,512,64) ;
C = rand(512,512,49) ;

Ai = imresize(A,[512,512]) ;
Bi = imresize(B,[512,512]) ;
Ci = imresize(C,[512,512]) ;

iwant = cat(3,Ai,Bi,Ci) ;

[khaled alsaih]

No need to make rand I have the data already And I have many mat files so I want to make a for loop to read the mat files then resize them Then concat Thanks a lot for your answer

[Jan]

KSSV used rand to produce some example data.