[Octave-bug-tracker] [bug #33523] Matlab compatibility issue with averaging the 3rd dim of a 2-D array

[Fred]

Follow-up Comment #17, bug #33523 (project octave):

Hi,
I have come across the same issue using octave recently (which I just switched
to). I completely agree with John's comment. In my example, I need to take the
mean of the 3rd dimension, but only in some arbitrary range (1:2 for instance)
which can happen to be singleton.

>> a = zeros(3,4,5); k=1:2;
>> mean(a(:,:,k),3)
ans =

        0        0        0        0
        0        0        0        0
        0        0        0        0

If the range appears to be singleton, it bugs:

>> k=1:1;
>> mean(a(:,:,k),3)
error: mean: DIM must be an integer and a valid dimension
error: called from:
error:   /usr/share/octave/3.4.2/m/statistics/base/mean.m at line 111, column
5

Strangely, I do not get a bug when doing the same thing on the second
dimension:

>> mean(a(:,k,k),2)
ans =

        0
        0
        0

This is due to the second dimension singleton being not removed. It does not
look coherent to me.

Is there any plan to get this corrected?

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