Major Description
Implement OneHotEncoding in R.
In R , usually one can use model.matrix to do one hot encoding. which accepts formula. I think we can support simple formula here.
model.matrix doc: https://stat.ethz.ch/R-manual/R-devel/library/stats/html/model.matrix.html
here is the example, that would be nice to have
example :
http://stackoverflow.com/questions/16200241/recode-categorical-factor-with-n-categories-into-n-binary-columns