Re:Generating all combinations
- To: mathgroup at smc.vnet.net
- Subject: [mg22517] Re:Generating all combinations
- From: "Alan W.Hopper" <awhopper at hermes.net.au>
- Date: Sun, 5 Mar 2000 00:24:57 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Here is a convenient solution for Wen-Feng Hsiao's problem ,
In[1]:= <<DiscreteMath`Combinatorica`
In[2]:= ?Strings
Strings [l,n] constructs all possible strings of length n
from the elements of list l.
In[4]:= ls=Strings[Range[-2, 2], 3] //Shallow
Out[4]//Shallow=
{{-2,-2,-2}, {-2,-2,-1}, {-2,-2,0}, {-2,-2,1},
{-2,-2,2}, {-2,-1,-2}, {-2,-1,-1}, {-2,-1,0},
{-2,-1,1}, {-2,-1,2} <<115>> }
In[5]:= Length[ls[[1]]]
Out[5]= 125
Alan Hopper
awhopper at hermes.net.au