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Re: Special Matrix

  • To: mathgroup at
  • Subject: [mg28231] Re: Special Matrix
  • From: "Paul Lutus" <nospam at>
  • Date: Fri, 6 Apr 2001 01:52:42 -0400 (EDT)
  • References: <9ah5nq$>
  • Sender: owner-wri-mathgroup at

"Yoram Pollack" <syftech at> wrote in message
news:9ah5nq$ps0 at
> Hello
> I am trying to create a "n x n" matrix with "1" in every position exept in
> first and last row, and first and last coulumn, where "0" is needed. In
> other words: sqare matrix full of  "1" sorounded by "0".
> What will be the fastest and shortest way to do it?

f[n_]:= Table[Sign[Mod[x*y,n-1]],{x,0,n-1},{y,0,n-1}]

Paul Lutus

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