Displaying 1 result from an estimated 1 matches for "matrixifi".
Did you mean:
matrixify
2012 Feb 09
1
How to properly build model matrices
I always bump into a few (very minor) problems when building model
matrices with e.g.:
train = model.matrix(label~., read.csv('train.csv'))
target = model.matrix(label~., read.csv('target.csv'))
(1) The two may have different factor levels, yielding different
matrices. I usually first rbind the data frames together to "meld"
the factors, and then split them apart and