tm (version 0.7-14)

ZipSource: ZIP File Source

Description

Create a ZIP file source.

Usage

ZipSource(zipfile,
          pattern = NULL,
          recursive = FALSE,
          ignore.case = FALSE,
          mode = "text")

Value

An object inheriting from ZipSource, SimpleSource, and

Source.

Arguments

zipfile

A character string with the full path name of a ZIP file.

pattern

an optional regular expression. Only file names in the ZIP file which match the regular expression will be returned.

recursive

logical. Should the listing recurse into directories?

ignore.case

logical. Should pattern-matching be case-insensitive?

mode

a character string specifying if and how files should be read in. Available modes are:

""

No read. In this case getElem and pGetElem only deliver URIs.

"binary"

Files are read in binary raw mode (via readBin).

"text"

Files are read as text (via readLines).

Details

A ZIP file source extracts a compressed ZIP file via unzip and interprets each file as a document.

See Also

Source for basic information on the source infrastructure employed by package tm.

Examples

zipfile <- tempfile()
files <- Sys.glob(file.path(system.file("texts", "txt", package = "tm"), "*"))
zip(zipfile, files)
zipfile <- paste0(zipfile, ".zip")
Corpus(ZipSource(zipfile, recursive = TRUE))[[1]]
file.remove(zipfile)