Re: Combinations

*To*: mathgroup at smc.vnet.net*Subject*: [mg49710] Re: Combinations*From*: Erich Neuwirth <erich.neuwirth at univie.ac.at>*Date*: Thu, 29 Jul 2004 07:43:28 -0400 (EDT)*References*: <ce5dk5$b87$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Seq[objs_, length_] := Flatten[Apply[Outer, Join[{Join}, Table[Map[List, objs], {i, 1, length}], {1}]], length - 1] Seq[{a, b, c}, 3] Gregory Lypny wrote: > Hello everyone, > > Does Mathematica have a built-in function that will generate a simple > list all possible combinations of a list of strings? For example, > {a,b,c}, where the elements are strings, should give 3x3=27 triplets of > "aaa", "aba", etc. > > I tried > > In[4]:=Outer[{a,b,c},{a,b,c},{a,b,c}] > > but I get > > {{{a, b, c}[a, a], {a, b, c}[a, b], { > a, b, c}[a, c]}, {{a, b, c}[b, a], {a, b, c}[b, b], {a, b, > c}[b, c]}, {{a, b, c}[c, a], {a, b, c}[c, b], {a, b, c}[c, c]}} > > which is going to be difficult to match with my data using BinCounts > and the like. > > Regards, > > Greg >