"subset"(x, ...)
"["(x, ...)
"subset"(x, ...)Lexissubset.data.frame. This will normally be some logical
expression selecting a subset of the rows. For details see
subset.data.frame.Lexis object with selected rows and columns.
Lexis objects works exactly as the method
for data frames. So does the "[" method. The special methods are neeed in
order to propagate the Lexis-specific attributes. The method for stacked.Lexis objects also shrinks the set of
levels for lex.Cst and lex.Xst to those actually
occurring in the resulting data frame.
Lexis, merge.Lexis