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MathGroup Archive 2006

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Re: Count Function

  • To: mathgroup at
  • Subject: [mg65533] Re: [mg65501] Count Function
  • From: "David Park" <djmp at>
  • Date: Thu, 6 Apr 2006 06:52:57 -0400 (EDT)
  • Sender: owner-wri-mathgroup at


What about...

Count[X[[All,14]], x_/;x > -9.]

David Park
djmp at 

From: Gregory Lypny [mailto:gregory.lypny at]
To: mathgroup at

The syntax will be the death of me.

Count[X[[All,14]], -9.] will tally how many elements in column 14 of  
matrix X are equal to -9, but I can't for the life of me figure out  
how to get how many are greater than -9.  Any hint would be most  


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