Split 3D matrix into many 2D matrix and save them individually in matlab

I have a 3D matlab matrix mamed "P3D", row*column*page=64*153*4096. I want to split it into 2D matrix according to the page. I want to get 2D matrix, row*colume=64*153 and the total number of these 2D matrix is 4096. Let's say they are "P2Di" , i=1 to 4096. Also I want to save the 2D matrix into the format of .csv and finally get 4096 .csv files. How could I do this in matlab? Thank you. I am a beginner with matlab.

Answer 1

[Abhijit Nayak]

So, we need a way to extract the 2D matrix along z-axis and then save them as .csv file.

I have given a code below for (3*4*2) 3D matrix. Make the changes of the size as per your requirements and proceed.

The following example code should give the desired result:

%P3D stores your desired 3D matrix of size 64*153*4096.
 %Assign your available 3D matrix to P3D. 
  P3D = rand(3,4,2);
  [x y z] = size(P3D)
  for itr = 1:z
   filename = "P2D"+itr+".csv";
   new_matrix = P3D(:,:,itr);
   writematrix(new_matrix, filename)
 end 

You will find the saved 4096 .csv files in the MATLAB folder in your pre-set pathway.

P.S: You can use ‘csvwrite’ function too instead of ‘writematrix’ function.

You can go through the link provided below to write individual 2D matrixes into the .csv files:

https://www.mathworks.com/matlabcentral/answers/281156-how-can-i-export-a-matrix-as-a-csv-file