4-d arrays not filling the loop output properly

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Sagar Parajuli 2021-8-12

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https://ww2.mathworks.cn/matlabcentral/answers/896832-4-d-arrays-not-filling-the-loop-output-properly

评论： Walter Roberson 2021-8-13

采纳的回答： Walter Roberson

aod_final_arng.mat

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I am trying to create a 4-d matrix by extracting data from a 3-d array within a loop. But the results are not as expected. I expect to fill the aod_nonan(:, :, :, 1) with aod_final_arng(:, :, 1:160) and aod_nonan(:, :, :, 2) with aod_final_arng(:, :, 161:320) but both are filled with the second set of results only. I am sure there is a problem here which I can't figure out. Could anyone help please? I have attached sample data.

load aod_final_arng; 
for i = 1:2;
    for k = 1:160:320;
aod_nonan(:, :, :, i) = aod_final_arng(:, :, k:(k-1)+160);
    end;
end;

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Walter Roberson 2021-8-12

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https://ww2.mathworks.cn/matlabcentral/answers/896832-4-d-arrays-not-filling-the-loop-output-properly#answer_765437

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You do not need the loop.

asz = size(aod_final_arng);
aod_nonan = reshape(aod_final_arng, asz(1), asz(2), 160, []);

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Sagar Parajuli 2021-8-13

Thank you, this is perfect, exactly what I was looking for, k_vals should be kvals though. Thank you for explaining.

Walter Roberson 2021-8-13

You are right, I mis-typed.

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