how to split an 8x8 2D array
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how would I split an 8x8 2D array into four 4x4 arrays so that I can take the mean of each 4x4 array using the mean function?
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% Sample 8x8 array
A = reshape(1:64, [8,8])
% Splitting into 4x4 arrays
A1 = A(1:4, 1:4)
A2 = A(1:4, 5:8)
A3 = A(5:8, 1:4)
A4 = A(5:8, 5:8)
% Computing the mean for each 4x4 array
mean_A1 = mean(A1(:));
mean_A2 = mean(A2(:));
mean_A3 = mean(A3(:));
mean_A4 = mean(A4(:));
% Displaying the results
fprintf('Mean of A1: %f\n', mean_A1);
fprintf('Mean of A2: %f\n', mean_A2);
fprintf('Mean of A3: %f\n', mean_A3);
fprintf('Mean of A4: %f\n', mean_A4);
2 个评论
Freja
2023-8-10
Yes we can use loop for splitting and Mean calculation
A = reshape(1:64, [8,8]);
mean_values = zeros(1, 4);
% Loop to extract 4x4 matrices and compute mean
for row = 1:2
for col = 1:2
r = (row-1)*4 + 1 : row*4;
c = (col-1)*4 + 1 : col*4;
submatrix = A(r, c);
idx = (row-1)*2 + col;
mean_values(idx) = mean(submatrix(:));
end
end
for i = 1:4
fprintf('Mean of A%d: %f\n', i, mean_values(i));
end
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