Re: Function to handle array with variable _number_ of dimensions?
- To: mathgroup at smc.vnet.net
- Subject: [mg58530] Re: [mg58509] Function to handle array with variable _number_ of dimensions?
- From: Sseziwa Mukasa <mukasa at jeol.com>
- Date: Wed, 6 Jul 2005 03:11:15 -0400 (EDT)
- References: <200507050557.BAA29447@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
On Jul 5, 2005, at 1:57 AM, Joe Christy wrote:
> I'd like to write a function that takes two integer arguments, P and Q
> say, and then returns a value calculated from the P x P x ... x P (Q
> factors) array, whose entries depend on both P and Q. My first impulse
> is to try and iterate over the array, but I don't see how to
> generate a
> non-fixed number of iteration variables.
>
> Does anyone have a suggestion of a good way to do this, short of
> writing
> a a distinct variant function for each possible value of Q?
Your question is unclear, do you have a Q dimensional array that you
are extracting elements from, or a 1 dimensional array that you are
extracting the P^Qth element from? Incidentally you probably should
use lower case variables.
If it's the first case just use Table
arr[[Sequence@@Table[p,{q}]]]
will extract the element p,p,...p repeated q times of arr.
Regards,
Ssezi
- References:
- Function to handle array with variable _number_ of dimensions?
- From: Joe Christy <joe@eshu.net>
- Function to handle array with variable _number_ of dimensions?