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) 


I would appreciate your help.

Kind regards

andy

Andrew McFadden MVS BVSc
Incursion Investigator
Investigation & Diagnostic Centres - Wallaceville Biosecurity New 
Zealand Ministry of Agriculture and Forestry

Phone 04 894 5600 Fax 04 894 4973 Mobile 029 894 5611 Postal address: 
Investigation and Diagnostic Centre- Wallaceville Box 40742 Ward St 
Upper Hutt


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