DirSource: Directory Source

In tm: Text Mining Package

Description

Create a directory source.

Usage

DirSource(directory = ".",
          encoding = "",
          pattern = NULL,
          recursive = FALSE,
          ignore.case = FALSE,
          mode = "text")

Arguments

directory	A character vector of full path names; the default corresponds to the working directory getwd().
encoding	a character string describing the current encoding. It is passed to iconv to convert the input to UTF-8.
pattern	an optional regular expression. Only file names 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 directory source acquires a list of files via dir and interprets each file as a document.

Value

An object inheriting from DirSource, SimpleSource, and Source.

See Also

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

Encoding and iconv on encodings.

Examples

DirSource(system.file("texts", "txt", package = "tm"))

Example output

Loading required package: NLP
$encoding
[1] ""

$length
[1] 5

$position
[1] 0

$reader
function (elem, language, id) 
{
    if (!is.null(elem$uri)) 
        id <- basename(elem$uri)
    PlainTextDocument(elem$content, id = id, language = language)
}
<environment: namespace:tm>

$mode
[1] "text"

$filelist
[1] "/usr/lib/R/site-library/tm/texts/txt/ovid_1.txt"
[2] "/usr/lib/R/site-library/tm/texts/txt/ovid_2.txt"
[3] "/usr/lib/R/site-library/tm/texts/txt/ovid_3.txt"
[4] "/usr/lib/R/site-library/tm/texts/txt/ovid_4.txt"
[5] "/usr/lib/R/site-library/tm/texts/txt/ovid_5.txt"

attr(,"class")
[1] "DirSource"    "SimpleSource" "Source"      

tm documentation built on April 7, 2021, 3:01 a.m.