How to convert data sample with size 58 x 32 into matrikx 4x4

I have audio sample with size of 58 x 32. And I want to convert this sample into a 4 x4 matrix. Can anyone help me?

[Clayton Gotberg]

There's not really enough information here to help. Do you mean that you want to turn this 56x32 matrix into a bunch of 4x4 matrices?

If you want to represent this matrix as a single 4x4 matrix, what information is in this matrix and what information needs to be in the 4x4 matrix? How was this matrix generated? Why does it need to be 4x4 instead of 56x32?

[Winda Mariana]

sorry sir. I mean, i want to turn this 56x32 matrix into a bunch of 4x4 matrices

[Winda Mariana]

So there will be 116 x 16 samples

Answer 1

[Clayton Gotberg]

If I understand your new message correctly, you want to get all of the possible 4x4 matrices from this 56x32 matrix. In that case, try:

for j = 1:size(voice_frame,1)-3
    for k = 1:size(voice_frame,2)-3
        local_matrix{j,k} = voice_frame(j:j+3,k:k+3)
    end
end

After this, the {j,k}th cell of local_matrix will be the 4x4 matrix in voice_frame that starts at (j,k).

If instead, you just want to break the big matrix up into smaller matrices, maybe this is closer:

for j = 1:size(voice_frame,1)/4
    for k = 1:size(voice_frame,2)/4
        local_matrix{j,k} = voice_frame(4*j-3:min(4*j,end),4*k-3:min(4*k,end))
    end
end

[Winda Mariana]

Thankyou so much!