help with standard deviation 3d matrix

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 :)

Answer 1

[Walter Roberson]

stack_std = reshape(std( reshape( double(YourMatrix), [], size(YourMatrix,3) ) ), 1, 1, []);

[itend]

Brilliant, thanks!

Answer 2

[the cyclist]

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]);

[itend]

Awesome, thanks :)