Julia and Matlab in the sum () of the different _julia

Julia and Matlab have many similarities, but there are some different, usually need to pay attention to. For example, sum () is a class.
% MATLAB in sum
>> a= [1 2 3 4; 2 3 4 5]
A =
1 2 3 4
2 3 4 5
>> sum (a)% matlab, is the default is sum (a,1)
Ans =
3 5 7 9
>> sum (a,1)
Ans =
3 5 7 9
>> sum (a,2)
Ans =
10
14
# The sum in Julia
Julia> a= [1 2 3 4; 2 3 4 5]
2x4 array{int64,2}:
1 2 3 4
2 3 4 5
Julia> sum (a) # Julia, refers to all elements added ...
24
Julia> sum (a,1)
1x4 array{int64,2}:
3 5 7 9
Julia> sum (a,2)
2x1 array{int64,2}:
10
14

In comparison, Julia's design, personally, is more reasonable.