[R] How to select a subset?

[Peter Dalgaard BSA]

Malerba Giovanni <bobo at medgen.univr.it> writes:

> I have a data.frame in which each individual has information on age,
> gender, smoke and many other quantitative and qualitative data. How could
> I prepare a new data.frame (or other - what?) where only 'male smokers'
> are selected and in which there are all other variables available (to
> perform the same analysis in a subset of individuals)?
> Thanks in advance,
> Giovanni Malerba

Take a look at subset()

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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