set_node_position {DiagrammeR} | R Documentation |
Apply position information for a
single node. This is done by setting the x
and y
attrs for a node id
or node
label
supplied in node
. When
rendering the graph, nodes with attribute values
set for x
and y
will be fixed to
those positions on the graph canvas.
set_node_position(graph, node, x, y, use_labels = FALSE)
graph |
a graph object of class
|
node |
a single-length vector containing either a node ID value (integer) or a node label (character) for which position information should be applied. |
x |
the x coordinate to set for the node. |
y |
the y coordinate to set for the node. |
use_labels |
an option to use a node
|
a graph object of class dgr_graph
.
# Create a simple graph with 4 nodes graph <- create_graph() %>% add_node(label = "one") %>% add_node(label = "two") %>% add_node(label = "three") %>% add_node(label = "four") # Add position information to each of # the graph's nodes graph <- graph %>% set_node_position( node = 1, x = 1, y = 1) %>% set_node_position( node = 2, x = 2, y = 2) %>% set_node_position( node = 3, x = 3, y = 3) %>% set_node_position( node = 4, x = 4, y = 4) # View the graph's node data frame to # verify that the `x` and `y` node # attributes are available and set to # the values provided graph %>% get_node_df() # The same function can modify the data # in the `x` and `y` attributes graph <- graph %>% set_node_position( node = 1, x = 1, y = 4) %>% set_node_position( node = 2, x = 3, y = 3) %>% set_node_position( node = 3, x = 3, y = 2) %>% set_node_position( node = 4, x = 4, y = 1) # View the graph's node data frame graph %>% get_node_df() # Position changes can also be made by # supplying a node `label` value (and setting # `use_labels` to TRUE). For this to work, # all `label` values in the graph's ndf must # be unique and non-NA graph <- graph %>% set_node_position( node = "one", x = 1, y = 1, use_labels = TRUE) %>% set_node_position( node = "two", x = 2, y = 2, use_labels = TRUE) # View the graph's node data frame graph %>% get_node_df()