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MathGroup Archive 2005

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Re: Partitioning a list from an index

  • To: mathgroup at smc.vnet.net
  • Subject: [mg56924] Re: Partitioning a list from an index
  • From: dh <dh at metrohm.ch>
  • Date: Tue, 10 May 2005 03:42:34 -0400 (EDT)
  • References: <d5mv78$e05$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi Guy,
see below,
Daniel

Guy Israeli wrote:
> hello,
> 
> how can partition a list (doesn't have to be with 'Partition') such that the 
> partition will begin with a specific index?
> 
> like this:
> 
> list1={1,2,3,4,5,6,7,8,9,10}
> 
> and i might want to split it to pairs or threes from index 6 for example, so 
> for threes it will be
> 
> {1,2,{3,4,5},{6,7,8},9,10}

e.g.:
Join[
      Take[list1,2],
      Partition[ Take[list1,{3,9}] , 3],
      Take[list1,{10,12}]
     ]

> 
> with or without padding to those that are left, depends on what it is 
> possible, or maybe put them together or something
> 
> for pairs it will be {1,{2,3},{4,5},{6,7},{8,9},10}

similar to above

> again with or without padding
> 
> thank you very much
> 
> Guy 
> 
> 


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