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how to build pattern for a square matrix of reals?

• To: mathgroup at smc.vnet.net
• Subject: [mg98379] how to build pattern for a square matrix of reals?
• From: sagrailo at gmail.com
• Date: Wed, 8 Apr 2009 05:03:43 -0400 (EDT)

As in subject: how to build a pattern that will specify that given
argument of a function has to be square matrix of reals?  Tried with
following for "square matrix" part:
  f[x_?MatrixQ[#] && Dimensions[#][[1]] == Dimensions[#][[2]]
&] := ...
but it doesn't seem to be working...

Thanks.

• Follow-Ups:
  • Re: how to build pattern for a square matrix of reals?
    • From: Adriano Pascoletti <adriano.pascoletti@dimi.uniud.it>