Convert an eligible input object into a dfm, or check whether an object is a dfm. Current eligible inputs for coercion to a dfm are: matrix, (sparse) Matrix, TermDocumentMatrix, DocumentTermMatrix, data.frame, and other dfm objects.

as.dfm(x)

is.dfm(x)

## Arguments

x a candidate object for checking or coercion to dfm

## Value

as.dfm converts an input object into a dfm. Row names are used for docnames, and column names for featnames, of the resulting dfm. is.dfm returns TRUE if and only if its argument is a dfm.

as.data.frame.dfm, as.matrix.dfm, convert