[R] Listing function

[Petr Klasterecky]

Use c() to extend your list creating a list of lists:

Lst = list(name="Fred", wife="Mary", no.children=3, cild.ages=c(4,7,9))

Lst <- c(list(Lst), list(list(name="Barney", wife="Liz", no.children=2, 
cild.ages=c(3,5))))

You can give names to the components:

Lst <- c(Fred=list(Lst), Barney=list(list(name="Barney", wife="Liz", 
no.children=2, cild.ages=c(3,5))))

See ?c for more information. You can also use a data.frame if this looks 
too messy.
Petr

Schmitt, Corinna napsal(a):
> Hallo,
> 
> I build a list by the following way:
> 
> Lst = list(name="Fred", wife="Mary", no.children=3, cild.ages=c(4,7,9))
> 
> I know how I can extract the information one by one. But now I want to
> add a new entry which looks like
> 
> name="Barney", wife="Liz", no.children=2, cild.ages=c(3,5)
> 
> How can I add this information to Lst without overwriting the first
> entry?
> How can I then extract the corresponding information if I have both
> entries in Lst?
> 
> Thanks for helping,
> 
> Corinna
> 
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-- 
Petr Klasterecky
Dept. of Probability and Statistics
Charles University in Prague
Czech Republic