data.tree (version 0.2.0-3)

GetAttribute: Get an attribute from a Node.

Description

Get an attribute from a Node.

Usage

GetAttribute(node, attribute, ..., format = NULL,
  inheritFromAncestors = FALSE, nullAsNa = TRUE)

Arguments

node

The Node from which the attribute should be fetched.

attribute

determines what is collected. The attribute can be

• a.) the name of a field of each Node in the tree

• b.) the name of a method of each Node in the tree

• c.) a function, whose first argument must be a Node

...

in case the attribute is a function or a method, the ellipsis is passed to it as additional arguments.

format

can be a function that transforms the collected values, e.g. for printing

inheritFromAncestors

if TRUE, then the path above a Node is searched to get the attribute in case it is NULL.

nullAsNa

If TRUE (the default), then NULL is returned as NA. Otherwise it is returned as NULL.

Examples

# NOT RUN {
data(acme)
GetAttribute(acme$IT$Outsource, "cost")
# }