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MathGroup Archive 2010

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Compile with Boolean Arrays

  • To: mathgroup at smc.vnet.net
  • Subject: [mg111679] Compile with Boolean Arrays
  • From: Stephen Wandzura <smwandzura at hrl.com>
  • Date: Tue, 10 Aug 2010 03:54:54 -0400 (EDT)
  • Reply-to: Stephen Wandzura <wandzura at mac.com>

Can anyone explain why this works:

MatrixMultiply =
 Compile[
  {{a, _Integer, 2}, {x, _Integer, 1}},
  Inner[Times, a, x, Plus],
  {{Inner[__], _Integer, 1}}
  ]

MatrixMultiply[{{2, 0}, {0, 1}}, {2, 1}]

But this doesn't:

LogicalMatrixMultiply =
 Compile[
  {{a, True | False, 2}, {x, True | False, 1}},
  Inner[And, a, x, Or],
  {{Inner[__], True | False, 1}}
  ]

LogicalMatrixMultiply[{{True, False}, {False, True}}, {True, False}]

I thought I used the correct syntax for Boolean arguments in Compile...


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