The double bracket operator can be used on vertex sequences, to print the meta-data (vertex attributes) of the vertices in the sequence.
Value
The double bracket operator returns another vertex sequence, with meta-data (attribute) printing turned on. See details below.
Details
Technically, when used with vertex sequences, the double bracket operator does exactly the same as the single bracket operator, but the resulting vertex sequence is printed differently: all attributes of the vertices in the sequence are printed as well.
See [.igraph.vs
for more about indexing vertex sequences.
See also
Other vertex and edge sequences:
E()
,
V()
,
as_ids()
,
igraph-es-attributes
,
igraph-es-indexing
,
igraph-es-indexing2
,
igraph-vs-attributes
,
igraph-vs-indexing
,
print.igraph.es()
,
print.igraph.vs()
Other vertex and edge sequence operations:
c.igraph.es()
,
c.igraph.vs()
,
difference.igraph.es()
,
difference.igraph.vs()
,
igraph-es-indexing
,
igraph-es-indexing2
,
igraph-vs-indexing
,
intersection.igraph.es()
,
intersection.igraph.vs()
,
rev.igraph.es()
,
rev.igraph.vs()
,
union.igraph.es()
,
union.igraph.vs()
,
unique.igraph.es()
,
unique.igraph.vs()
Examples
g <- make_ring(10) %>%
set_vertex_attr("color", value = "red") %>%
set_vertex_attr("name", value = LETTERS[1:10])
V(g)
#> + 10/10 vertices, named, from 27a837c:
#> [1] A B C D E F G H I J
V(g)[[]]
#> + 10/10 vertices, named, from 27a837c:
#> color name
#> 1 red A
#> 2 red B
#> 3 red C
#> 4 red D
#> 5 red E
#> 6 red F
#> 7 red G
#> 8 red H
#> 9 red I
#> 10 red J
V(g)[1:5]
#> + 5/10 vertices, named, from 27a837c:
#> [1] A B C D E
V(g)[[1:5]]
#> + 5/10 vertices, named, from 27a837c:
#> color name
#> 1 red A
#> 2 red B
#> 3 red C
#> 4 red D
#> 5 red E