change the dimension of a cell in a cell array

hi, i have a cell array of size 480000x1, in each cell, the size is 384x1 as shown in the picture. I would like to change the 384x1 dimension of every cell to 6x64. could anyone help me please? thanks in advance.

i tried writing the below code but got an error. help please!

Answer 1

[David Hill]

for k=1:length(XTrain)
    XTrain{k}=reshape(XTrain{k},6,[]);
end

[ZEMIN HUANG]

THANKS DAVID! THATS HELPFUL

Answer 2

[Image Analyst]

You almost definitely should not use a cell array for this. They are slow and have lots of overhead. It looks like you can use a regular double 480000 x 384 matrix, or even a table. Just start out with a 3-D array of 480000 x 6 x 64.

[ZEMIN HUANG]

ok thanks Image Analyst! will explore on that!

[ZEMIN HUANG]

hi image analyst, how do i convert the cell array to 480000x384 matrix that you mentioned

[Image Analyst]

You would not convert it because you would/should never create a cell array in the first place. You would just do

    for row = 1 : 48000
        for k = 1 : 64
            column1 = (k-1) * 6 + 1;
            column2 = column1 + 5;
            m(row, column1 : column2) = someVectorOfLength6;
        end        
    end