Get edge attribute values
From a graph object of class dgr_graph, get edge attribute values for
one or more edges.
get_edge_attrs(graph, edge_attr, from = NULL, to = NULL)
graph |
A graph object of class |
edge_attr |
the name of the attribute for which to get values. |
from |
an optional vector of node IDs from which the edge is outgoing for filtering the list of edges. |
to |
an optional vector of node IDs from which the edge is incoming for filtering the list of edges. |
A named vector of edge attribute values for the attribute given by
edge_attr by edge.
# Create a simple graph where
# edges have an edge attribute
# named `value`
graph <-
create_graph() %>%
add_n_nodes(n = 4) %>%
{
edges <-
create_edge_df(
from = c(1, 2, 1, 4),
to = c(2, 3, 4, 3),
rel = "rel")
add_edge_df(
graph = .,
edge_df = edges)
} %>%
set_edge_attrs(
edge_attr = value,
values = 1.6,
from = 1,
to = 2) %>%
set_edge_attrs(
edge_attr = value,
values = 4.3,
from = 1,
to = 4) %>%
set_edge_attrs(
edge_attr = value,
values = 2.9,
from = 2,
to = 3) %>%
set_edge_attrs(
edge_attr = value,
values = 8.4,
from = 4,
to = 3)
# Get the values for the
# `value` edge attribute
graph %>%
get_edge_attrs(
edge_attr = value)
# To only return edge attribute
# values for specified edges, use
# the `from` and `to` arguments
graph %>%
get_edge_attrs(
edge_attr = value,
from = c(1, 2),
to = c(2, 3))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.