By element average of multiple matrices
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I have 40 matrices of 781x981 in dimension. I need to calculate the by element mean of all these matrices in a new, 41st matrix.
I.e., the mean of element 1,1 of all 40 matrices is returned as element 1,1 in the new, 41st matrix. The same is then done for all elements.
In additionto the mean, I need to do the same for the standard deviation also.
Is there a function in Matlab that can do this? Or do I have to write some kind of a loop??
Wayne King on 3 Apr 2012
Yes, concatenate the matrices into a 3-D array and use mean(x,3)
x = randn(4,4,10);
To concatenate, you can use cat()
x = randn(4,4);
y = randn(4,4);
z = cat(3,x,y);