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Simply but handy question

• To: mathgroup at smc.vnet.net
• Subject: [mg124815] Simply but handy question
• From: jediwhelan <jediwhelan at googlemail.com>
• Date: Wed, 8 Feb 2012 05:29:04 -0500 (EST)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com

Dear group members,

I am new to mathematica (well, I'm not actually but I haven't used it
in 5 years +).

Is there an easy way to return a matrix X of 1's and 0's to test
whether the entries in Y
are different from zero.

i.e.,

if Y = {{a,b},{0,c}}

Then X would return

X = {{1,1},{0,1}}

This would be handy for very large or complicated matrices where one
would like to know if specific entries are zero?

Many thanks,
Paul

• Follow-Ups:
  • Re: Simply but handy question
    • From: Murray Eisenberg <murray@math.umass.edu>
  • Re: Simply but handy question
    • From: Barrie Stokes <Barrie.Stokes@newcastle.edu.au>
  • Re: Simply but handy question
    • From: Christoph Lhotka <christoph.lhotka@fundp.ac.be>
  • Re: Simply but handy question
    • From: Bob Hanlon <hanlonr357@gmail.com>