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MathGroup Archive 2002

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Re: Beginners Question - Series list problem

  • To: mathgroup at smc.vnet.net
  • Subject: [mg35676] Re: [mg35636] Beginners Question - Series list problem
  • From: "Julio Vera" <jvera at adinet.com.uy>
  • Date: Thu, 25 Jul 2002 04:46:15 -0400 (EDT)
  • References: <200207240605.CAA28634@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Barry,

I think you are looking for the command NestList.

A function ff is defined, for example

ff[a_]:=2a

The first element is defined

In[] fir=1
Out[] 1

Then ff is applied a number of times to the first and following elements

In[] lst=NestList[ff,fir,10]
Out[] {1,2,4,8,16,32,64,128,256,512,1024}

Julio
----- Original Message ----- 
From: "Baz" <bazcor at tiscali.co.uk>
To: mathgroup at smc.vnet.net
Subject: [mg35676] [mg35636] Beginners Question - Series list problem


> I am trying to generate a list of numbers where the number being
> calculated is dependant on the previous list member. 
> 
> What I (think I) need is a function, like
> SeriesTable[expr,{InitialValue,imax}] where IntitialValue will be the
> first value in the list and expr will be evaluated on this value to
> form the second value and so on Imax times.
> 
> 
> My attempts to write such a function have failed miserably. Please
> help ... Barry
> 



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