set_edge_attrs {DiagrammeR} | R Documentation |
From a graph object of
class dgr_graph
, set edge
attribute values for one or more
edges.
set_edge_attrs(graph, edge_attr, values, from = NULL, to = NULL)
graph |
a graph object of
class |
edge_attr |
the name of the attribute to set. |
values |
the values to be set for the chosen attribute for the chosen edges. |
from |
an optional vector of node IDs from which the edge is outgoing for filtering list of nodes with outgoing edges in the graph. |
to |
an optional vector of node IDs from which the edge is incoming for filtering list of nodes with incoming edges in the graph. |
a graph object of class
dgr_graph
.
# Create a simple graph ndf <- create_node_df( n = 4, type = "basic", label = TRUE, value = c(3.5, 2.6, 9.4, 2.7)) edf <- create_edge_df( from = c(1, 2, 3), to = c(4, 3, 1), rel = "leading_to") graph <- create_graph( nodes_df = ndf, edges_df = edf) # Set attribute `color = "green"` # for edges `1`->`4` and `3`->`1` # in the graph graph <- graph %>% set_edge_attrs( edge_attr = color, values = "green", from = c(1, 3), to = c(4, 1)) # Set attribute `color = "blue"` # for all edges in the graph graph <- graph %>% set_edge_attrs( edge_attr = color, values = "blue") # Set attribute `color = "pink"` # for all edges in graph outbound # from node with ID value `1` graph <- graph %>% set_edge_attrs( edge_attr = color, values = "pink", from = 1) # Set attribute `color = "black"` # for all edges in graph inbound # to node with ID `1` graph <- graph %>% set_edge_attrs( edge_attr = color, values = "black", to = 1)