[Jprogramming] Sum of empty vector

[Anssi Sepp�l]

Working with practical statistics and samples that can be also empty 
I find  that J follows a kind of logic that is uncomfortable. Taking 
a empty vector 0$0 (empty sample) :

   +/0$0        NB. sum of empty sample is zero !
0
   (+/ % #) 0$0 NB. mean of empty sample is also zero !
0

I wonder why (+/0$0)  could not be 0$0 instead of 0 ?

Anssi

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