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MathGroup Archive 2007

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Re: Plus sets in mathematica..?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg75970] Re: Plus sets in mathematica..?
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Mon, 14 May 2007 03:40:25 -0400 (EDT)
  • Organization: The Open University, Milton Keynes, UK
  • References: <f26ocl$4tn$1@smc.vnet.net>

changbo wrote:
> I want to make a function "f", its domain is every thinkable two sets, and the result is  {a+b | aâ??A,bâ??B} for A,B.
> 
>  ex) A={1,2,3}, B={40,50,60,70}, 
>  then I have f[A,B] as
>  {41,42,43,51,52,53,61,62,63,71,72,73}.
> 
>  How can I construct function "f"? Let me know the source.. Thank you very much

One possible way is the following:

In[1]:=
A = {1, 2, 3};
B = {40, 50, 60, 70};
f[a_, b_] := Flatten[Outer[Plus, b, a]]
f[A, B]

Out[4]=
{41, 42, 43, 51, 52, 53, 61, 62, 63, 71, 72, 73}

Regards,
Jean-Marc


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