Re: Variables names
- To: mathgroup at smc.vnet.net
- Subject: [mg15048] Re: [mg15002] Variables names
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Wed, 9 Dec 1998 04:12:30 -0500
- Organization: Universitaet Leipzig, Institut fuer Informatik
- References: <199812050630.BAA04464@smc.vnet.net.>
- Sender: owner-wri-mathgroup at wolfram.com
Hi Kim,
the best way is to use x[i] instead of x1, x2, ...
You can still generate the names with
ToExpression["x"<>ToString[i]]
Hope that helps
Jens
Kim Allemand wrote:
> Hi,
> I have a square matrix Q of dimension N and would like to generate the
> quadratic function $\sum_{i,j}q_{ij}x_i x_j$. The problem is how to say
> to Mathamatica that the variables names are x1, x2, etc. Is it possible
> to generate variables names in an automatic way? A possibility would be
> to generate manually a vector NN={x1, x2, x3, ....} of dimension N and
> then to pick NN[[i]] for the ith variable name, but imagine when
> N=1000... !!
> Thanks, Kim
- References:
- Variables names
- From: Kim Allemand <kim.allemand@epfl.ch>
- Variables names