The function "mean" in 3.0.1:

[John W. Eaton]

On 10-Jul-2009, Dave Goel wrote:

| octave:127> version
| ans = 3.0.1
| octave:128> a=[1 2 3]
| a =
| 
|    1   2   3
| 
| octave:129> b=mean(a,[])
| b =
| 
|    1   2   3
| 
| The ansnwer should have been 2 per the documention, which says that
| the dimension is by default taken to be the first dimension with >1
| elements:
| 
| DIM     dimension
|         1 MEAN of columns
|         2 MEAN of rows
|         N MEAN of  N-th dimension
|         default or []: first DIMENSION, with more than 1 element
| 
| 
| 
| The function mean is found here for my octave:
| 
| `/usr/share/octave/packages/nan-1.0.6/mean.m'
| which comes from the debian package octave-nan.

So the bug is not in Octave, but a function from a package.  You
should report the problem to the package maintainer.

jwe