amean¶
Purpose¶
Computes the mean across one dimension of an N-dimensional array.
Format¶
-
y =
amean(x, dim)¶ - Parameters:
x (N-dimensional array.) –
dim (scalar) – the dimension across which to compute the mean.
- Returns:
y ([N-1]-dimensional array) –
Examples¶
// Create an additive sequence from 1-24
x = seqa(1, 1, 24);
// 'Reshape' this 24x1 vector into a 2x3x4 dimensional array
x = areshape(x, 2|3|4);
y = amean(x, 3);
x is a 2x3x4 array, such that: [1,1,1] through [1,3,4] =
1.0000000 2.0000000 3.0000000 4.0000000
5.0000000 6.0000000 7.0000000 8.0000000
9.0000000 10.000000 11.000000 12.000000
[2,1,1] through [2,3,4] =
13.000000 14.000000 15.000000 16.000000
17.000000 18.000000 19.000000 20.000000
21.000000 22.000000 23.000000 24.000000
y will be a 1x3x4 array, such that: [1,1,1] through [1,3,4] =
7.0000000 8.0000000 9.0000000 10.000000
11.000000 12.000000 13.000000 14.000000
15.000000 16.000000 17.000000 18.000000
y = amean(x, 1);
Using the same array x as the above example, this example computes the mean across the first dimension. y will be a 2x3x1 array, such that: [1,1,1] through [1,3,1] =
2.5000000
6.5000000
10.500000
[2,1,1] through [2,3,1] =
14.500000
18.500000
22.500000
Remarks¶
The output y, will have the same sizes of dimensions as x, except that the dimension indicated by dim will be collapsed to 1.
See also
Functions asum()