How to take the mean of each four adjacent position in a matrix?

Question

Ali Almakhmari 2022-6-12

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1738870-how-to-take-the-mean-of-each-four-adjacent-position-in-a-matrix

回答： Chuguang Pan 2022-6-12

latitude_red.mat

So I have this matrix variable that I attached here. Its 1536 by 2048, and I want to reduce it to 768 by 1024 by taking the mean of each four adjacent positions with the omitnan opition as well so I can take out the useless NaNs there. I hope someone can help. Thanks

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Answer 1

Chuguang Pan 2022-6-12

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1738870-how-to-take-the-mean-of-each-four-adjacent-position-in-a-matrix#answer_983990

在 MATLAB Online 中打开

A=randi(10,1536,2048); % test Matrix
M=zeros(768,1024); % result Matrix
for row=1:768
    for col=1:1024
        M(row,col)=mean(A(2*row-1:2*row,2*col-1:2*col),'all','omitnan');
    end
end