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
>
>