Re: need to make a special function

*To*: mathgroup at smc.vnet.net*Subject*: [mg68308] Re: [mg68284] need to make a special function*From*: "Carl K. Woll" <carlw at wolfram.com>*Date*: Tue, 1 Aug 2006 06:59:29 -0400 (EDT)*References*: <200607310745.DAA26885@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Nabeel Butt wrote: > Dear Users, > I need help on making a special type of function which has the > following properties. > f[1]={{0},{1}} > f[2]={{0,0},{0,1},{1,0},{1,1}} > f[3]={{0,0,0},{0,0,1},{0,1,0},{0,1,1},{1,0,0},{1,0,1},{1,1,0},{1,1,1}} > .............so on you can see the pattern emerging. > I need a very efficient code to perform the above evaluation in some > optimization problem. > Thanks in advance. > regards, > Nabeel In version 5.1 you can use Tuples: In[7]:= Tuples[{0, 1}, 1] Out[7]= {{0}, {1}} In[8]:= Tuples[{0, 1}, 2] Out[8]= {{0, 0}, {0, 1}, {1, 0}, {1, 1}} In[9]:= Tuples[{0, 1}, 3] Out[9]= {{0, 0, 0}, {0, 0, 1}, {0, 1, 0}, {0, 1, 1}, {1, 0, 0}, {1, 0, 1}, {1, 1, 0}, {1, 1, 1}} Carl Woll Wolfram Research