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Simply but handy question

  • To: mathgroup at
  • Subject: [mg124815] Simply but handy question
  • From: jediwhelan <jediwhelan at>
  • Date: Wed, 8 Feb 2012 05:29:04 -0500 (EST)
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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.


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,

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