gvisOrgChart(data, idvar = "", parentvar = "", tipvar = "",
options = list(), chartid)data.frame. The data has to have at least three
columns. Each row in the data table describes one node (a rectangle in the
graph). Each node (except the root node) has one or more parent nodes. Each
node is sized and colored according to itdata describing the ID for each node. It
should be unique among all nodes, and can include any characters, including
spaces. This is shown on the node. You can specify a formatted value to show
on the chart instead, but the unfdata that match to entries in
idvar. If this is a root node, leave this NA. Only one root is
allowed.data for the tip variable. Tool-tip text
to show, when a user hovers over this node.