Check for a dfm, or convert a matrix into a dfm.
is.dfm(x) as.dfm(x)
| x | a dfm object |
|---|
is.dfm returns TRUE if and only if its argument is a dfm.
as.dfm coerces a matrix or data.frame to a dfm. Row names are
used for docnames, and column names for featnames, of the resulting dfm.