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Re: "Alternating" function

• To: mathgroup at smc.vnet.net
• Subject: [mg63283] Re: [mg63260] "Alternating" function
• From: Renan <renan.birck at gmail.com>
• Date: Thu, 22 Dec 2005 00:04:47 -0500 (EST)
• References: <200512210435.XAA14743@smc.vnet.net> <640A546D-21CE-4DFF-BDD0-9414A8EF775F@jeol.com>
• Sender: owner-wri-mathgroup at wolfram.com

On 12/21/05, Sseziwa Mukasa <mukasa at jeol.com> wrote:

> One way is to use Fold instead of Nest
>
> Fold[x+#2 f[#1]&,x,Table[(-1)^i,{i,0,n-1}]

This does it neatly, and the other solutions also work.

Thanks to Wouter, Dave, Sseziwa, Ingolf and Bob, and all others that I
forgot to mention the name!

:)

• References:
  • "Alternating" function
    • From: Renan <renan.birck@gmail.com>