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