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How to take an average every four columns?

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Chameleon17
Chameleon17 2018-2-13
评论： Chameleon17 2018-2-15
Hi, I have seen similar questions but I am getting stuck altering the code for what I want. I have a matrix of (64 x 18144), each row is a met station and each column is a 15 minute data measurement - I want to convert this to hourly data for each station - so I want to have an output matrix of (64 x 4536). I have seen some solutions but I don't have the 'tools' they require. Any help/ideas would be very much appreciated! :)

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James Tursa
James Tursa 2018-2-13
x = your 64x1844 matrix
result = reshape(mean(reshape(x.',4,[])),size(x,2)/4,[]).';

更多回答（1 个）

Andrei Bobrov
Andrei Bobrov 2018-2-13
编辑：Andrei Bobrov 2018-2-13
A - your matrix (64 x 18144)
B = A.';
[m,n] = size(B);
t = minutes((0:m)'*15);
Tb = array2timetable(B,'RowTimes',t);
Tout = retime(Tb,'hourly','mean');
out = Tout{:,:}';

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