tm: PCorpus – R documentation

Pricing

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

Get Started for Free

Documentation

PCorpus

Permanent Corpora

Description

Create permanent corpora.

Usage

PCorpus(x,
        readerControl = list(reader = reader(x), language = "en"),
        dbControl = list(dbName = "", dbType = "DB1"))

Arguments

x

A Source object.

readerControl

a named list of control parameters for reading in content from x.

reader: a function capable of reading in and processing the format delivered by x.
language: a character giving the language (preferably as IETF language tags, see language in package NLP). The default language is assumed to be English ("en").

dbControl

a named list of control parameters for the underlying database storage provided by package filehash.

dbName: a character giving the filename for the database.
dbType: a character giving the database format (see filehashOption for possible database formats).

Details

A permanent corpus stores documents outside of R in a database. Since multiple PCorpus R objects with the same underlying database can exist simultaneously in memory, changes in one get propagated to all corresponding objects (in contrast to the default R semantics).

Value

An object inheriting from PCorpus and Corpus.

Examples

txt <- system.file("texts", "txt", package = "tm")
## Not run: 
PCorpus(DirSource(txt),
        dbControl = list(dbName = "pcorpus.db", dbType = "DB1"))
## End(Not run)

tm

Text Mining Package

v0.7-8

GPL-3

Authors

Ingo Feinerer [aut, cre] (<https://orcid.org/0000-0001-7656-8338>), Kurt Hornik [aut] (<https://orcid.org/0000-0003-4198-9911>), Artifex Software, Inc. [ctb, cph] (pdf_info.ps taken from GPL Ghostscript)

Initial release

2020-11-17