install.packages('ffbase')
ff
vectordroplevels
is used to drop unused levels from a ff
factor or , more commonly, from factors in a ffdf
ff
vectorsdroplevels
is used to drop unused levels from factors
in a ffdf
ff
vectors as indexesff
vectors.ff
vectors.ff
vectors.ffdf
to another ffdf
ffdf
ff
vectors.ffdf
from All Combinations of Factorsff
vector x
ff
vector with draws from distributionff
vectorff
vector Elementsffdf
data.frame