Snip Parts of Tree Objects
snip.tree has two related functions. If
supplied, it removes those nodes and all their descendants from the
nodes is not supplied, the user is invited to select nodes
interactively; this makes sense only if the tree has already been
plotted. A node is selected by clicking with the left mouse button;
its number and the deviance of the current tree and that which would
remain if that node were removed are printed. Selecting the same node
again causes it to be removed (and the lines of its sub-tree erased).
Clicking any other button terminates the selection process.
snip.tree(tree, nodes, xy.save = FALSE, digits = getOption("digits") - 3)
An object of class
An integer vector giving those nodes that are the roots of sub-trees to be snipped off. If missing, the user is invited to select a node at which to snip.
If true, the
ycoordinates selected interactively are saved as attribute
.xyof the returned value.
Precision used in printing statistics for selected nodes.
A tree object containing the nodes that remain after specified or selected subtrees have been snipped off.
Prior to version 1.0-34, the saved coordinates were place in object
.xy in the workspace.