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MathGroup Archive 2005

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Re: List Partition

  • To: mathgroup at smc.vnet.net
  • Subject: [mg53963] Re: List Partition
  • From: Roland Franzius <roland.franzius at uos.de>
  • Date: Sat, 5 Feb 2005 03:15:50 -0500 (EST)
  • Organization: Universitaet Hannover
  • References: <ctqe1f$sf7$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

zak wrote:
> what could i do to partition the list:
> a={cat,E,in,the,hat,E,okay,fine,E}
> into
> a={{cat},{{in},{the},{hat}},{{okay},{fine}}}
> 
> ie:  every word in a sublist , and E determine the end of a sentence
> (a bigger list).

I take a function phrase. The definition is up to you eg. List

a = {cat, E, in, the, hat, E, okay, fine, E};
Select[c = phrase[];
        FoldList[If[#2 =!= E, Append[#1, #2], c = phrase[]] &, c, a
        # =!= phrase[] &]


{phrase[cat], phrase[in], phrase[in, the], phrase[in, the, hat], 
phrase[okay], phrase[okay, fine]}

-- 

Roland Franzius


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