## S3 method for class 'Lexis':
transform(`_data`, \dots)
## S3 method for class 'Lexis':
factorize(obj, \dots)Lexis.Lexis.transform.data.frame.Lexis object.Lexis objects works exactly as the
method for data frames.
factorize simply transforms the variables lex.Cst and
lex.Xst to factors with the same set of levels.Lexis,
merge.Lexis,
subset.Lexis