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MathGroup Archive 2007

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Selecting Rows Where All Columns Satisfy a Condition

  • To: mathgroup at smc.vnet.net
  • Subject: [mg82571] Selecting Rows Where All Columns Satisfy a Condition
  • From: Gregory Lypny <gregory.lypny at videotron.ca>
  • Date: Thu, 25 Oct 2007 06:04:00 -0400 (EDT)

Hello everyone

I've got an Nx4 numeric array called X.  I'd like to pull out all  
rows where -9 does not appear in any of the four columns.  I know I  
can this:

Select[X, #[[1]] != -9 && #[[2]] != -9 && #[[3]] != -9 && #[[4]] !=  
-9 &]

But is there a more elegant way that applies the not-equal-to  
condition to each column without having to repeat it?

Regards,

	Gregory


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