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Counting nonzeros

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  • Subject: [mg86865] Counting nonzeros
  • From: carlos at Colorado.EDU
  • Date: Mon, 24 Mar 2008 01:44:20 -0500 (EST)

I want to count the # of NZ entries in an arbitrary multilevel list,
say exp, that contains only integers.  Is this the easiest way:

  k = Length[Flatten[exp]]-Count[Flatten[exp],0]

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