Services & Resources / Wolfram Forums
MathGroup Archive
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2004

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Iterator problem.

  • To: mathgroup at
  • Subject: [mg52336] Re: Iterator problem.
  • From: David Bailey <dave at>
  • Date: Wed, 24 Nov 2004 02:32:07 -0500 (EST)
  • References: <cnuoj6$squ$>
  • Sender: owner-wri-mathgroup at

Robert G. Wilson v wrote:
> Hello,
> 	I am having a problem with iterators in Mathematica.
> 	I have a sequence of integers defined by a[n]. I wish to build a table
> of integers out of the above such that this table only contains integers of
> the form a(i)+a(j)+a(k).
> 	I tried Table[a[i] + a[j] + a[k], {k, 1, 3}, {j, i, k}, {i, 1, j}] but
> the iterators do not have appropriate bounds.
> 	Any help would be greatly appreciated.
> Sincerely,
> Bob.
Your middle iterator depends on i, which is your innermost iterator - 
hence the error. Try

Table[a[i] + a[j] + a[k], {k, 1, 3}, {j, i, k}, {i, 1, j}] //Flatten

David Bailey

  • Prev by Date: Re: UnitStep
  • Next by Date: Re: Iterator problem.
  • Previous by thread: Re: Iterator problem.
  • Next by thread: Re: Iterator problem.