tm_reduce: Combine Transformations
Description
Fold multiple transformations (mappings) into a single one.
Usage
tm_reduce(x, tmFuns, ...)
Arguments
tmFuns
A list of tm transformations.
...
Arguments to the individual transformations.
Value
A single tm transformation function obtained by folding tmFuns
from right to left (via Reduce(..., right = TRUE)
).
See Also
Reduce
for R's internal folding/accumulation mechanism, and
getTransformations
to list available transformation
(mapping) functions.
Examples
data(crude)
crude[[1]]
skipWords <- function(x) removeWords(x, c("it", "the"))
funs <- list(stripWhitespace,
skipWords,
removePunctuation,
content_transformer(tolower))
tm_map(crude, FUN = tm_reduce, tmFuns = funs)[[1]]