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Re: List manipulation

  • To: mathgroup at
  • Subject: [mg73257] Re: [mg73248] List manipulation
  • From: Stern <nycstern at>
  • Date: Fri, 9 Feb 2007 02:15:50 -0500 (EST)
  • References: <>

It occurs to me that you may not be familiar with anonymous functions,
in which case the 'f' in my previous example would not translate
smoothly for you to working code. Consider the following, in which I
use the 'Total' function instead of a generic 'f' :

liste = {{a1, a2, a3}, {b1, b2, b3}, {c1, c2, c3}};

Map[Total[#] &, Map[Union[#, {e}] &, liste]]

   -> {a1 + a2 + a3 + e, b1 + b2 + b3 + e, c1 + c2 + c3 + e}



On 2/8/07, sepp <gary.larson at> wrote:
> hello,
> I would like to combine list elements in the following way:
> I have a list with
> liste={{a1,a2,a3},{b1,b2,b3},{c1,c2,c3},.....}
> and a single element {e}
> I would to add the element {e} to each sublist to get something like
> liste_new={ {a1,a2,a3,e},{b1,b2,b3,e},{c1,c2,c3,e},.....}
> so that finally I can apply a function f on the list
> liste_manipulated={f[ {a1,a2,a3,e}],f[{b1,b2,b3,e}],f[{c1,c2,c3,e}],.....}
> I had a look at thread, mapthread, inner, outer, but nothing really
> seems to fit...
> thank you in advance for useful comments!

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