Re: [R] Another simple q - removing negative values

From: Wiener, Matthew <matthew_wiener_at_merck.com>
Date: Fri 15 Jul 2005 - 22:19:24 EST


To leave x with only the non-negative elements, you can use x[x >= 0]. Also see the function "subset".

Hope this helps,

Matt Wiener

-----Original Message-----
From: r-help-bounces@stat.math.ethz.ch
[mailto:r-help-bounces@stat.math.ethz.ch] On Behalf Of Michael Hopkins Sent: Friday, July 15, 2005 8:00 AM
To: r-help@stat.math.ethz.ch
Subject: [R] Another simple q - removing negative values

Sorry folks but again I have failed in my understanding of how to do a very simple thing. I've read the various texts and searched the help archives but no positive result so far.

I want to remove all the rows in a data frame where one of the variables has negative values. In approx Stata pseudocode:

   drop _all, if( x < 0 )

Please either point me to relevant sections of the docs or supply me with solution - I'm sure it's very simple.

Michael



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R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Jul 15 22:23:21 2005

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