sum() behaving erratically?

[mddejong]

I'm a bit embarrassed to ask this, but here goes:

If I let a=[1,2;3,4]; and then ask for sum(a), sum(a,1) and sum(a,2), I
get the answers

4 6     4 6     3
                7

respectively. Now I let a=[1,2]; and do the same. I now get

3       1 2     3

indicating that in the second case sum(a) != sum(a,1), in direct violation
of the documentation in the manual. Is this supposed to be like this and
didn't I understand things, or is it a bug? (Octave is 2.1.57.)


Kind regards,
Maarten



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