I think you need to do something with your strings. Usually this means
converting them into terms and giving each term a separate id, making each term
a feature and numberic. And remember that all IDs must be usable by Mahout.
This typically means that you have to replace all of your ids with
AbstractIDMigrator is for being able to use String IDs (it converts
Strings to Longs.)
IDs are stored in Long types, so there should not be any problems with
negative IDs, but in practice I have not work with negative IDs
before.
Tevfik
On Wed, Aug 6, 2014 at 3:51 AM, Peng Zhang
