data.tree (version 0.7.0)

Prune: Prunes a tree.

Description

Pruning refers to removing entire subtrees. This function has side-effects, it modifies your data.tree structure!

Usage

Prune(node, pruneFun)

Arguments

node

The root of the sub-tree to be pruned

pruneFun

allows providing a 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.

Value

the number of nodes removed

See Also

Node

Examples

# NOT RUN {
data(acme)
acme$Do(function(x) x$cost <- Aggregate(x, "cost", sum))
Prune(acme, function(x) x$cost > 700000)
print(acme, "cost")

# }

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