Re: question: {a,b,c}->{{a,b},{b,c}}??
- To: mathgroup at smc.vnet.net
- Subject: [mg2506] Re: question: {a,b,c}->{{a,b},{b,c}}??
- From: Christian.Jost at epc.u-psud.fr (Christian Jost)
- Date: Wed, 15 Nov 1995 02:00:07 -0500
- Organization: Universite Paris-Sud XI
In article <DHtHo7.2pr at wri.com>, "Bart van der Zwet"
<B.W.v.d.Zwet at stud.tue.nl> wrote:
> Hello,
>
> I'm working on a problem in which I have to substitute a list,
> for instance {a,b,c,d} by the other list {{a,b},{b,c},{c,d}}.
> I've managed to solve it for a given length of the first list, by
> using the substitution-rule :
> {a_,b_,c_} -> {{a,b},{b,c}} (this for a list of three elements)
> I would like to find out how this can be done for a list of arbitrary
> length.
>
Just use the Partition command (Mathematica book page 131)
In[1]:
Partition[{a,b,c},2,1]
Out[1]
{{a, b}, {b, c}}
Hope that helps, Christian.
Christian Jost, Universit Paris-Sud XI, Orsay, France
jost at psisun.u-psud.fr