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MathGroup Archive 2005

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Re: basic issue with do and :=

  • To: mathgroup at smc.vnet.net
  • Subject: [mg60418] Re: basic issue with do and :=
  • From: David Bailey <dave at Remove_Thisdbailey.co.uk>
  • Date: Fri, 16 Sep 2005 03:48:57 -0400 (EDT)
  • References: <dgbevg$fol$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

David wrote:
> Hi all,
> 
> this works as (I) expected
> 
> -------------------------
> Do[a[i] = i, {i, 10}]
> Do[b[i] =a[i]+1, {i, 10}]
> -------------------------
> 
> While this doesn't:
> 
> --------------------------
> Do[a[i] = i, {i, 10}]
> Do[b[i] :=a[i]+1, {i, 10}]
> ---------------------------
> 
> [note ":=" instead of "=" on the second line].
> 
> namely the output is: "b[2]:=a[i]+1" for all i
> 
> 
> 
> Is there any compact way to define: "b[i] :=a[i]+1" for all i ?
> 
> 
> Thank you in advance,
> 
> David
> 
David,

I think it would help if you explained what problem you are trying to 
solve. Remember, Mathematica is not a theorem prover (although you could 
write one using it).

I would also advise you to try lots of examples from the book and maybe 
even go on a course.

David Bailey
http://www.dbaileyconsultancy.co.uk


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