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help with standard deviation 3d matrix

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itend
itend 2017-6-11
评论： itend 2017-6-11
I have a 3D matrix of size (600 x 800 x 322) unit 16.
I would like to take the standard deviation of each 600 x 800 matrix -- I am trying to get a result matrix size 1 x 1 x 322 containing the standard deviation of each matrix in this "stack".
I have tried using the std and std2 function, but haven't been able to get this to work.
Please help :)

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采纳的回答

Walter Roberson
Walter Roberson 2017-6-11
stack_std = reshape(std( reshape( double(YourMatrix), [], size(YourMatrix,3) ) ), 1, 1, []);

更多回答（1 个）

the cyclist
the cyclist 2017-6-11
Reshape the matrix before taking the standard deviation, then reshape back:
M = rand(600,800,322);
M_r = reshape(M,480000,322);
sd_r = std(M_r);
sd = reshape(sd_r,[1 1 322]);

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