set_edge_attrs {DiagrammeR} | R Documentation |
From a graph object of class
dgr_graph
or an edge data frame, set edge
attribute properties for one or more edges
set_edge_attrs(x, edge_attr, values, from = NULL, to = NULL)
x |
either 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. |
either a graph object of class
dgr_graph
or an edge data frame, depending on
what type of object was supplied to x
.
# 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` using the graph object graph <- set_edge_attrs( x = graph, edge_attr = "color", values = "green", from = c(1, 3), to = c(4, 1)) # Set attribute `color = "green"` for edges # `1`->`4` and `3`->`1` using the edge # data frame edges <- set_edge_attrs( x = edf, edge_attr = "color", values = "green", from = c(1, 3), to = c(4, 1)) # Set attribute `color = "blue"` for all edges # in the graph graph <- set_edge_attrs( x = graph, edge_attr = "color", values = "blue") # Set attribute `color = "pink"` for all edges in # graph outbound from node with ID value `1` graph <- set_edge_attrs( x = graph, edge_attr = "color", values = "pink", from = 1) # Set attribute `color = "black"` for all edges in # graph inbound to node with ID `1` graph <- set_edge_attrs( x = graph, edge_attr = "color", values = "black", to = 1)