Subset and nanmean of a three dimensional array to a have a 2d array 1xndim

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CARLOTTA DENTICO 2021-6-17

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编辑： Matt J 2021-6-18

采纳的回答： Matt J

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Hi, I am very new to matlab and I need your help.

I have a 3d array 609x881x348 being lonxlatxtime of sst data.

I need to subset to a specific location, calculate mean (nanmean) and reshape this array in order to have a final 1x348 array, so having the nanmean of a subset of data in that specif area of interest for 348 time period.

So far I did this:

s1pos = (lon>=12 & lon<=16 & lat>=76 & lat<=77);  %609x881 logical of zeros and ones 
pt_lev(:,:,1) = nanmean(pt_lev8(s1pos)); 

But it doesn't give what am I looking for...

Hope the question is clear.

Thank you very much!!!

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CARLOTTA DENTICO 2021-6-18

Thank you!!

Stephen23 2021-6-18

@CARLOTTA DENTICO: please accept the answer that helped you most.

http://web.archive.org/web/20210618082332/https://www.mathworks.com/matlabcentral/answers/858975-solved-subset-and-nanmean-of-a-three-dimensional-array-to-a-have-a-2d-array-1xndim

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Matt J 2021-6-17

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https://ww2.mathworks.cn/matlabcentral/answers/858975-subset-and-nanmean-of-a-three-dimensional-array-to-a-have-a-2d-array-1xndim#answer_727275

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pt_lev8=reshape(pt_lev8,[],348);
final = mean(pt_lev8(s1pos,:),1,'omitnan')

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CARLOTTA DENTICO 2021-6-18

Thank you very much, it works perfectly!!

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MATLAB Language Fundamentals Matrices and Arrays Resizing and Reshaping Matrices

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