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I define 2 functions:

g[s_][x_,y_] := the gaussian  (1)

g1[s_,x_,y_] := the gaussian  (2)

I get the same answer using g[s][ x, y] and g1[ s, x, y].
So, what is the difference?
Is there some advantage to be gained in definition 1 over 2?

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Possible duplicate: mathematica.stackexchange.com/q/7999/121 –  Mr.Wizard Jul 17 '13 at 1:32
2  
On the surface, not much. But, they are treated differently by the evaluator, the second (a downvalue) being evaluated before the first (a subvalue). Also, you can add an attribute to a downvalue, but not to a subvalue, without some contortions. –  rcollyer Jul 17 '13 at 4:07
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marked as duplicate by rcollyer, Oleksandr R., Michael E2, Kuba, Sjoerd C. de Vries Jul 17 '13 at 5:33

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