This library provides Python functions for hierarchical clustering.
It generates hierarchical clusters from distance matrices or from
vector data.

Part of this module is intended to replace the functions (linkage,
single, complete, average, weighted, centroid, median, ward) in the
module scipy.cluster.hierarchy with the same functionality but much
faster algorithms.  Moreover, the function linkage_vector provides
memory-efficient clustering for vector data.

The interface is very similar to MATLAB's Statistics Toolbox API to
make code easier to port from MATLAB to Python/NumPy. The core
implementation of this library is in C++ for efficiency.
