rescale_node_attrs {DiagrammeR} | R Documentation |
From a graph object of class
dgr_graph
, take a set of numeric values for a
node attribute, rescale to a new numeric or color
range, then write to the same node attribute or to
a new node attribute column.
rescale_node_attrs(graph, node_attr_from, to_lower_bound = 0, to_upper_bound = 1, node_attr_to = NULL, from_lower_bound = NULL, from_upper_bound = NULL)
graph |
a graph object of class
|
node_attr_from |
the node attribute containing numeric data that is to be rescaled to new numeric or color values. |
to_lower_bound |
the lower bound value for the set of rescaled values. This can be a numeric value or an X11 color name. |
to_upper_bound |
the upper bound value for the set of rescaled values. This can be a numeric value or an X11 color name. |
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. |
from_lower_bound |
an optional, manually set lower bound value for the rescaled values. If not set, the minimum value from the set will be used. |
from_upper_bound |
an optional, manually set upper bound value for the rescaled values. If not set, the minimum value from the set will be used. |
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 = value, values = rnorm( n = count_nodes(.), mean = 5, sd = 1) %>% round(1)) # Get the graph's internal ndf # to show which node attributes # are available graph %>% get_node_df() # Rescale the `value` node # attribute, so that its values # are rescaled between 0 and 1 graph <- graph %>% rescale_node_attrs( node_attr_from = value, to_lower_bound = 0, to_upper_bound = 1) # Get the graph's internal ndf # to show that the node attribute # values had been rescaled graph %>% get_node_df() # Scale the values in the `value` # node attribute to different # shades of gray for the `fillcolor` # and `fontcolor` node attributes graph <- graph %>% rescale_node_attrs( node_attr_from = value, to_lower_bound = "gray80", to_upper_bound = "gray20", node_attr_to = fillcolor) %>% rescale_node_attrs( node_attr_from = value, to_lower_bound = "gray5", to_upper_bound = "gray95", node_attr_to = fontcolor) # Get the graph's internal ndf # once more to show that scaled # grayscale colors are now available # in the `fillcolor` and `fontcolor` # node attributes graph %>% get_node_df()