Re: sum() behaving erratically?

[Henry F. Mollet]

I'm using Octave 2.1.46 and get the same results.
octave:9> help sum
sum is a built-in function
 - Built-in Function:  sum (X, DIM)
     Sum of elements along dimension DIM.  If DIM is omitted, it
     defaults to 1 (column-wise sum).
Therefore I'd expect for a=[1,2];
that sum(a) should be the same as sum (a,1)  = 1 2 and as stated below.
Henry


on 10/6/04 4:14 PM, address@hidden at address@hidden wrote:

> 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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