Section: Elementary Functions
y = mean(x,d)
where x is an n-dimensions array of numerical type.
The output is of the same numerical type as the input. The argument
d is optional, and denotes the dimension along which to take
the mean. The output y is the same size as x, except
that it is singular along the mean direction. So, for example,
if x is a 3 x 3 x 4 array, and we compute the mean along
dimension d=2, then the output is of size 3 x 1 x 4.
If d is omitted, then the mean is taken along the
first non-singleton dimension of x.
--> A = [5,1,3;3,2,1;0,3,1] A = <int32> - size: [3 3] Columns 1 to 3 5 1 3 3 2 1 0 3 1
We start by calling mean without a dimension argument, in which
case it defaults to the first nonsingular dimension (in this case,
along the columns or d = 1).
--> mean(A) ans = <double> - size: [1 3] Columns 1 to 3 2.6666666666666665 2.0000000000000000 1.6666666666666667
Next, we take the mean along the rows.
--> mean(A,2) ans = <double> - size: [3 1] Columns 1 to 1 3.0000000000000000 2.0000000000000000 1.3333333333333333