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MathGroup Archive 2006

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Re: Partition

  • To: mathgroup at smc.vnet.net
  • Subject: [mg71658] Re: Partition
  • From: Peter Pein <petsie at dordos.net>
  • Date: Sun, 26 Nov 2006 03:48:39 -0500 (EST)
  • References: <ek975q$fjq$1@smc.vnet.net>

KFUPM schrieb:
> Dear All
> 
> I have a very large list of numbers that look like this: ( although the
> size is different)
> 
> list={a,b,c,d,e,f,g,h,i,j,k,l,m,n,o}
> 
> And i need to rewrite the list into
> 
> list2={a,{b,c,d,e},f,{g,h,i,j,},k,{l,m,n,o}}
> 
> Since my list is too big, i need Mathematica to do it for me regardless
> of the site of the list.
> 
> I would appreciate it if you can help me in this regard,
> 
> Thanks
> 
> KFUPM
> 

Flatten[(Through[{First, Rest}[#1]] & ) /@ Partition[list, 5], 1]

or

Partition[list, 5] /. {(f_)?AtomQ, r__} :> Sequence[f, {r}]

are my first two ideas.

P²


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