DSC class cannot be instantiated,
but it serves as a base class from which all DSC classes
inherit. Class DSC provides several generic functions that can
operate on all DSC subclasses:
print(), plot(), nclusters() to
get the current number of clusters,
get_centers() to get the cluster centers,
and get_weights() to get the cluster weights
(if implemented). get_centers() and get_weights()
are typically overwritten by subclasses of DSC.
plot,
nclusters,
get_centers,
get_weights,
get_assignment,
get_copy