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MathGroup Archive 2007

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Re: Grid

  • To: mathgroup at smc.vnet.net
  • Subject: [mg80932] Re: Grid
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Thu, 6 Sep 2007 05:16:41 -0400 (EDT)
  • Organization: Uni Leipzig
  • References: <fblk36$qic$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de

Hi,

the idea of a SparseArray[] is that the most entries are zero
and only a few are non zero and must be stored.

And why you use a SparseArray[] for a so tiny matrix of 9 x 9 ?
SparseArray[]s are for 10000 x 10000 arrays.

Regards
   Jens

John wrote:
> I want to create a 9x9 grid that has specified positive integers,
> fewer than 81, entered in specified cells. I used SparseArray to enter
> the specified numbers in the specified cells, but it put a 0 in every
> unspecified cell.How do I convert the zeros to blanks?
> 
> John
> 
> 


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