If x is a vector, compute the mean of the elements of x If x is a matrix, compute the mean for each column and return them in a row vector.
With the optional argument opt, the kind of mean computed can be selected. The following options are recognized:
"a"
- Compute the (ordinary) arithmetic mean. This is the default.
"g"
- Compute the geometric mean.
"h"
- Compute the harmonic mean.
If the optional argument dim is supplied, work along dimension dim.
Both dim and opt are optional. If both are supplied, either may appear first.