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Re: how to map function with over 1 arguments to list


On May 20, 2005, at 4:44 AM, xun wrote:

> Hi, all,
>
> g[x_]:=x^2;
> g/@{1,2,3} results in{1,4,9}
>
> similarly, how to map f[x_,y_]:=x+y;
> to {1,1},{2,2}?
>
> it seems that f/@{{1,1},{2,2}} doesn't work.

In this case you want to use Apply

f@@@{{1,1},{2,2}}

If you want to use Map then

f[#[[1]],#[[2]]]&/@{{1,1},{2,2}}

will work.  If you want to see details on how these methods work use 
Trace eg. Trace[f@@@{{1,1},{2,2}}].

Later,

Ssezi


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