Getting help on Breeze
This chapter gives a reasonably detailed introduction to Breeze, but it does not aim to give a complete API reference.
To get a full list of Breeze's functionality, consult the Breeze Wiki page on GitHub at https://github.com/scalanlp/breeze/wiki. This is very complete for some modules and less complete for others. The source code (https://github.com/scalanlp/breeze/) is detailed and gives a lot of information. To understand how a particular function is meant to be used, look at the unit tests for that function.