tm_reduce {tm}R Documentation

Combine Transformations

Description

Fold multiple transformations (mappings) into a single one.

Usage

tm_reduce(x, tmFuns, ...)

Arguments

x

A corpus.

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)).

Author(s)

Ingo Feinerer

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, tolower)
tm_map(crude, FUN = tm_reduce, tmFuns = funs)[[1]]
[Package tm version 0.5-10 Index]