when I run mahout trainlogistic , there is an optional param --features
from the book Mahout in action, it says:
--features
The size of the internal feature vector to use in building the model. A
larger value here can be helpful, especially with text-like input data
so is this something like
Putting a smaller value here will degrade prediction quality because more
and more features will collide in the hashed feature space. Increasing
this beyond a certain point, however, will not significantly increase
prediction quality and it will increase memory usage.
On Fri, Apr 27, 2012 at