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Re: Functions with vector arguments

  • To: mathgroup at smc.vnet.net
  • Subject: [mg36235] Re: Functions with vector arguments
  • From: "ET" <ed.toussieh at worldet.att.net>
  • Date: Tue, 27 Aug 2002 02:08:00 -0400 (EDT)
  • References: <akcpm8$557$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

I do not know why you are getting a message, using your own code I get the
result you expect.
"anhjunk" <anhjunk at hotmail.com> wrote in message
news:akcpm8$557$1 at smc.vnet.net...
> Some functions with vector arguments work as expected and some give
> errors. I would appreciate if someone can clarify why.
>
> First an example of a function definition that works fine :
> f[u_,v_] := u.v
> Calling it with f[{x1,y1},{x2,y2}] gives the expected result x1 x2 +
> y1 y2.
>
> Now an example that does not work :
> g[u_,v_] := u-v
> Calling it with g[{x1,y1},{x2,y2}] one would expect the answer {x1-x2,
> y1-y2} but instead one gets error messages.
>
> Why ? And how do I fix g (i.e write a function that outputs the
> difference of 2 vectors).
>
> Thanks
>



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