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Re: Partition


KFUPM wrote:
> 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
> 
You could try

In[1]:=
list = {a, b, c, d, e, f, g, h, i, j, k, l, m, n, o};

In[2]:=
Flatten[Partition[list, 5] /. {(x_)?AtomQ, y__} -> {x, {y}}, 1]

Out[2]=
{a, {b, c, d, e}, f, {g, h, i, j}, k, {l, m, n, o}}

Regards,
Jean-Marc


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