[R] union of lists

[Agustin Lobo]

Hi there,

Given 2 lists of integer vectors, i.e.:

> lista1
$"1"
[1]  1 34  5
$"2"
[1] 2 1
$"3"
[1]  3 10 15

> lista2
$"1"
[1] 1 5
$"2"
[1] 2 1
$"3"
[1]  3 10 29


I want to obtain the union of both, defined
as the union of the vectors, that is 
lista.union[[1]] <- union(lista1[[1]],lista2[[1]]):

> lista.union
$"1"
[1]  1 34  5
$"2"
[1] 2 1
$"3"
[1]  3 10 15 29

I'm now using a for loop and applying
union() to each pair of vectors, but is
there a faster way avoiding the for ?

Thanks!

Agus


Dr. Agustin Lobo
Instituto de Ciencias de la Tierra (CSIC)
Lluis Sole Sabaris s/n
08028 Barcelona SPAIN
tel 34 93409 5410
fax 34 93411 0012
alobo at ija.csic.es


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