Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2005
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2005

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

Search the Archive

Re: Multiple Sums in Mathematica

  • To: mathgroup at smc.vnet.net
  • Subject: [mg53700] Re: Multiple Sums in Mathematica
  • From: David Bailey <dave at Remove_Thisdbailey.co.uk>
  • Date: Mon, 24 Jan 2005 03:37:21 -0500 (EST)
  • References: <csvir2$avi$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Sebastian Brandt wrote:
> Hello,
> 
> I want to perform a nested sum, where the number of summations is not
> specified. I.e., I am looking for a way to implement the sum
> 
> sum[ f, {i1, 1, M}, {i2, 1, M}, ..., {in, 1, M} ]
> 
> Does anbody know how to do this for arbitrary n?
> 
> Regards,
> 
> Sebastian Brandt
> 
Hi,

I think you want something like this:

xx = {{i, 1, 2}, {j, 1, 2}, {k, 1, 2}};


Sum[f[i, j, k], Evaluate[Sequence @@ xx]]

David Bailey
dbaileyconsultancy.co.uk


  • Prev by Date: Re: Multiple Sums in Mathematica
  • Next by Date: Re: Re: Saving the kernel state.
  • Previous by thread: Re: Multiple Sums in Mathematica
  • Next by thread: Re: Multiple Sums in Mathematica