data.tree (version 1.1.0)

print.Node: Print a Node in a human-readable fashion.

Description

Print a Node in a human-readable fashion.

Usage

# S3 method for Node
print(
  x,
  ...,
  pruneMethod = c("simple", "dist", NULL),
  limit = 100,
  pruneFun = NULL,
  row.names = T
)

Arguments

x

The Node

...

Node attributes to be printed. Can be either a character (i.e. the name of a Node field), a Node method, or a function taking a Node as a single argument. See Get for details on the meaning of attribute.

pruneMethod

The method can be used to prune for printing in a simple way. If NULL, the entire tree is displayed. If "simple", then only the first limit nodes are displayed. If "dist", then Nodes are removed everywhere in the tree, according to their level. If pruneFun is provided, then pruneMethod is ignored.

limit

The maximum number of nodes to print. Can be NULL if the entire tree should be printed.

pruneFun

allows providing a prune criteria, i.e. a function taking a Node as an input, and returning TRUE or FALSE. If the pruneFun returns FALSE for a Node, then the Node and its entire sub-tree will not be considered.

row.names

If TRUE (default), then the row names are printed out. Else, they are not.

Examples

data(acme)
print(acme, "cost", "p")
print(acme, "cost", probability = "p")
print(acme, expectedCost = function(x) x$cost * x$p)
do.call(print, c(acme, acme$attributesAll))

tree <- CreateRegularTree(4, 5)
# print entire tree:
print(tree, pruneMethod = NULL)
# print first 20 nodes:
print(tree, pruneMethod = "simple", limit = 20)
# print 20 nodes, removing leafs first:
print(tree, pruneMethod = "dist", limit = 20)
# provide your own pruning function:
print(tree, pruneFun = function(node) node$position != 2)