a[[0]] equivalent to a[[-1]] and so forth
- To: mathgroup at smc.vnet.net
- Subject: [mg65120] a[[0]] equivalent to a[[-1]] and so forth
- From: "Alexandre Costa" <amscosta at uem.br>
- Date: Wed, 15 Mar 2006 06:28:37 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Dear Group,
I have a simple issue:
If I have a list such as :
a = {4, 5, 6};
How can I do this in an elegant way:
a[[0]] equivalent to a[[-1]]
a[[-1]] equivalent to a[[-2]]
and so forth.
I thought of a[[If[i <=0, i - 1, i]]] would solve the problem
but I want a more elegant way of doing this.
Any help is very welcome,
Thanks,
Alex