Greedy algorithm described in Bien and Tibshirani (2011)
Prototype Selection for Interpretable Classification. Annals of
Applied Statistics. 5(4). 2403-2424

Performs minimax linkage hierarchical clustering.  Every
cluster has an associated prototype element that represents
that cluster as described in Bien, J., and Tibshirani, R.
(2011), "Hierarchical Clustering with Prototypes via Minimax
Linkage," accepted for publication in The Journal of the
American Statistical Association, DOI:
10.1198/jasa.2011.tm10183.

Performs minimax linkage hierarchical clustering.  Every cluster has an associated prototype element that represents that cluster as described in Bien, J., and Tibshirani, R. (2011), "Hierarchical Clustering with Prototypes via Minimax Linkage,"
accepted for publication in The Journal of the American Statistical Association, DOI: 10.1198/jasa.2011.tm10183.

Performs minimax linkage hierarchical clustering.  Every cluster
has an associated prototype element that represents that cluster as
described in Bien, J., and Tibshirani, R. (2011), "Hierarchical Clustering
with Prototypes via Minimax Linkage," accepted for publication in The
Journal of the American Statistical Association, DOI:
10.1198/jasa.2011.tm10183.

Performs minimax linkage hierarchical clustering.  Every cluster
has an associated prototype element that represents that cluster as
described in Bien, J., and Tibshirani, R. (2011), "Hierarchical Clustering
with Prototypes via Minimax Linkage," The Journal of the American
Statistical Association, 106(495), 1075-1084.

Fast and Simple Object Serialization to Protocol Buffers
High-performance C++ re-implementation of the object serialization
functionality from the 'RProtoBuf' package. Permissively licensed, fully
compatible, no bloat.

An optimized, permissively licensed C++ implementation for serializing
R objects to protocol-buffers. This lightweight package is complementary to the
much larger 'RProtoBuf' package which provides a full featured toolkit for
working with protocol-buffers in R.