Calculating mean values of a 3D matrix for every rows

2022 3 30
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更新时间：2022 4 6
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I have a matrix 12x441x1440. 12 is the dimension of time. how can I get 12 average numbers for every month from that matrix

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Simon Chan
Simon Chan 2022-3-30

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Try this:
mean(yourmatrix,[2 3]);

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Joydeb Saha
Joydeb Saha 2022-3-30
comes an error like this
Error using sum
Dimension argument must be a positive integer scalar within indexing range.
Error in mean (line 117)
y = sum(x, dim, flag)/size(x,dim);
Simon Chan
Simon Chan 2022-3-30
Ran in:
Ran in:
What is the dimension of your matrix?
Could you do size(yourmatrix)?
A = rand(12,441,1440);
size(A)
ans = 1×3
12 441 1440
B = mean(A,[2 3])
B = 12×1
0.4996 0.5005 0.4993 0.5002 0.4999 0.4999 0.5005 0.5002 0.5006 0.4996
Bruno Luong
Bruno Luong 2022-3-30
Look like you have old MATLAB version
mean(mean(yourmatrix,2),3);

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