Re: NestList
- To: mathgroup at smc.vnet.net
- Subject: [mg50560] Re: NestList
- From: "Michael Taktikos" <michael.taktikos at hanse.net>
- Date: Fri, 10 Sep 2004 04:06:00 -0400 (EDT)
- References: <chpa26$jt6$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Yes, it is possible. Example: You want to iterate the Cos-function 4 times to the starting value x, NestList[Cos, x, 4] The iterator can be written as pure function #+1&, so you can use a list of the two pure functions and apply it to a list with two starting values, {0,x}: In[1]:= NestList[{#[[1]]+1,Cos[#[[2]] ]}&,{0,x},4] Out[1]= {{0,x},{1,Cos[x]},{2,Cos[Cos[x]]},{3,Cos[Cos[Cos[x]]]},{4,Cos[Cos[Cos[Cos[x] ]]]}} Greetings from Hamburg, Michael Taktikos "Namrata Khemka" <namrata.khemka at gmail.com> schrieb im Newsbeitrag news:chpa26$jt6$1 at smc.vnet.net... > Hello everyone, > > I have a question regarding NestList function. > > I am applying a function on the expression n times. > > NestList [function, expr, n] > > However in my function I would like to know what is the current value > of n. In other words I would like to know what iteration it is on. > > Is this possible? > > Thanks in advance. > > Namrata Khemka >