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Re: Selecting Rows Where All Columns Satisfy a Condition

  • To: mathgroup at smc.vnet.net
  • Subject: [mg82644] Re: Selecting Rows Where All Columns Satisfy a Condition
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Fri, 26 Oct 2007 05:36:48 -0400 (EDT)
  • Organization: Uni Leipzig
  • References: <ffppu6$l6g$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de

Hi,

Select[X,FreeQ[#,-9] &]

??

Regards
   Jens

Gregory Lypny wrote:
> 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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