Re: need to make a special function

*To*: mathgroup at smc.vnet.net*Subject*: [mg68297] Re: [mg68284] need to make a special function*From*: Adriano Pascoletti <pascolet at dimi.uniud.it>*Date*: Tue, 1 Aug 2006 06:59:09 -0400 (EDT)*References*: <200607310745.DAA26885@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Nabeel, f[i] is the list of binary representations of integers from 0 to 2^i-1 (left padded with 0's): f = Function[i, IntegerDigits[#, 2, i] & /@ Range[0, 2^i - 1]]; For instance f[3] gives {{0,0,0},{0,0,1},{0,1,0},{0,1,1},{1,0,0},{1,0,1},{1,1,0},{1,1,1}} A solution in based on Distribute f1 = Distribute[Table[{0, 1}, {#}], List, List] &; f1[3] gives {{0,0,0},{0,0,1},{0,1,0},{0,1,1},{1,0,0},{1,0,1},{1,1,0},{1,1,1}} Adriano Pascoletti On 31 lug 2006, at 09:45, 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 > -- > Nabeel Butt > LUMS,Lahore > >