On Tue, 14 Apr 2009, Andrew McFadden wrote:
Hi all
I know this must be an easy one so sorry for the trouble. I would like
to select a list of variables within a factor
The following example is given in help for subset:
subset(airquality, Temp > 80 select = c(Ozone, Temp))
So how do I select all temperatures of 90 and 80 ie Temp = c(80,90)
subset(airquality, Temp %in% c(80,90))
-thomas
Thomas Lumley Assoc. Professor, Biostatistics
tlum...@u.washington.edu University of Washington, Seattle
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