The node_assign
class holds the unique annotation combinations and the
assignment of the nodes to those combinations for use in visualization.
Slots
groups
the unique groups, as a logical matrix
assignments
named character vector providing association with groups
description
named character vector providing a description to group
colors
named character vector of hex colors for groups or experiments
color_type
whether doing group or experiment based colors
pie_locs
if doing experiment colors, then pie graphs were generated here