build.children {HEMDAG}

Build children

Description

Build children for each node of a graph.

Usage

build.children(g)

build.children.top.down(g, levels)

build.children.bottom.up(g, levels)

Arguments

g

a graph of class graphNEL. It represents the hierarchy of the classes.

levels

a list of character vectors. Each component represents a graph level and the elements of any component correspond to nodes. The level 0 coincides with the root node.

Value

build.children returns a named list of vectors. Each component corresponds to a node x of the graph and its vector is the set of its children.

build.children.top.down returns a named list of character vectors. Each component corresponds to a node x of the graph (i.e. parent node) and its vector is the set of its children. The nodes are ordered from root (included) to leaves.

build.children.bottom.up returns a named list of character vectors. Each component corresponds to a node x of the graph (i.e. parent node) and its vector is the set of its children. The nodes are ordered from leaves (included) to root.

Examples

data(graph);
root <- root.node(g);
children <- build.children(g);
lev <- graph.levels(g, root=root);
children.tod <- build.children.top.down(g,lev);
children.bup <- build.children.bottom.up(g,lev);