tm_filter {tm} | R Documentation |
Interface to apply filter and index functions to corpora.
## S3 method for class 'PCorpus' tm_filter(x, FUN, ...) ## S3 method for class 'VCorpus' tm_filter(x, FUN, ...) ## S3 method for class 'PCorpus' tm_index(x, FUN, ...) ## S3 method for class 'VCorpus' tm_index(x, FUN, ...)
x |
A corpus. |
FUN |
a filter function taking a text document as input and returning a logical value. |
... |
arguments to |
tm_filter
returns a corpus containing documents where
FUN
matches, whereas tm_index
only returns the
corresponding indices.
data("crude") # Full-text search tm_filter(crude, FUN = function(x) any(grep("co[m]?pany", content(x))))