| recode_node_attrs {DiagrammeR} | R Documentation |
Within a graph's internal node data frame (ndf), recode character or numeric node attribute values. Optionally, one can specify a replacement value for any unmatched mappings.
recode_node_attrs(graph, node_attr_from, ..., otherwise = NULL, node_attr_to = NULL)
graph |
a graph object of class
|
node_attr_from |
the name of the node attribute column from which values will be recoded. |
... |
single-length character vectors with
the recoding instructions. The first component should
have the value to replace and the second should have
the replacement value (in the form
|
otherwise |
an optional single value for recoding any unmatched values. |
node_attr_to |
an optional name of a new node attribute to which the recoded values will be applied. This will retain the original node attribute and its values. |
a graph object of class
dgr_graph.
# Create a random graph using the
# `add_gnm_graph()` function
graph <-
create_graph() %>%
add_gnm_graph(
n = 5,
m = 10,
set_seed = 23) %>%
set_node_attrs(
node_attr = shape,
values =
c("circle", "hexagon",
"rectangle", "rectangle",
"circle"))
# Get the graph's internal ndf
# to show which node
# attributes are available
graph %>%
get_node_df()
# Recode the `shape` node
# attribute, so that `circle`
# is recoded to `square` and that
# `rectangle` becomes `triangle`
graph <-
graph %>%
recode_node_attrs(
node_attr_from = shape,
"circle -> square",
"rectangle -> triangle")
# Get the graph's internal
# ndf to show that the node
# attribute values had been recoded
graph %>%
get_node_df()
# Create a new node attribute,
# called `color`, that is based
# on a recoding of `shape`; here,
# map the square shape to a `red`
# color and map all other shapes
# to a `green` color
graph <-
graph %>%
recode_node_attrs(
node_attr_from = shape,
"square -> red",
otherwise = "green",
node_attr_to = color)
# Get the graph's internal ndf
# to see the change
graph %>%
get_node_df()