On Sat, Jan 12, 2013 at 10:36 AM, Biau David <[email protected]> wrote:
> Dear all,
>
> I would like to remove some edges from my network. I would like to remove
> all edges connecting one specific vertex (e.g., V(g)[type=='a']) to
> vertices which share a specific characteristic which I have identified (e.g.,
> V(g)[type=='b']) . I haven't found the way to identify these edges.
>
> Any idea?
>
See ?iterators:
‘inc’ takes a vertex sequence as an argument and returns ‘TRUE’
for edges which have an incident vertex in it.
E.g.
library(igraph)
g <- graph.ring(10)
E(g)[inc(1)]
# Edge sequence:
#
# [1] 2 -- 1
# [10] 10 -- 1
delete.edges(g, E(g)[inc(1)])
# IGRAPH U--- 10 8 -- Ring graph
# + attr: name (g/c), mutual (g/x), circular (g/x)
G.
>
> David Biau
>
>
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>
--
Gabor Csardi <[email protected]> MTA KFKI RMKI
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