[R] how to make a sub list from a long list using the component name?

Peter Dalgaard p.dalgaard at biostat.ku.dk
Fri Dec 2 17:46:48 CET 2005

szhan at uoguelph.ca writes:

> Hello, R users,
> I have a long list with over 20,000 elements (say foo), now I want to make a sub
> list of 30 elements from this list using the component names such as subname<-c(
> "a", "b", "d", "f", "g", "h", "o", "q",...). One way to do it is to make rest of
> elements in the list NULL, that is too silly. Is there another way to make the
> sub list?

What's wrong with foo[subname] ?

   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)                  FAX: (+45) 35327907

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