Draws horseshoes - left child, up over, down to right child
USAGE:
arbor.branch(x, y, node, branch)
ARGUMENTS:
- x
-
x coordinates of nodes
- y
-
y coordinates of nodes
- node
-
description of node number
- branch
-
controls shape of horseshoe (1 is default, 0 has no shoulder)
VALUE:
Internal function, called by
plot.arbor
. Not usually called by user.