readMail: Read In an E-Mail Document

In tm.plugin.mail: Text Mining E-Mail Plug-in

Read In an E-Mail Document

Description

Return a function which reads in an electronic mail document.

Usage

readMail(DateFormat = character())

Arguments

DateFormat

A character vector giving date-time formats for the “Date” header field in the mail document. By default, the “basic” formats of RFC 5322 are tried.

Details

Formally this function is a function generator, i.e., it returns a function (which reads in a mail document) with a well-defined signature, but can access passed over arguments (e.g., the “Date” header format) via lexical scoping.

Value

A function with the following formals:

elem

a named list with the component content which must hold the document to be read in.

language

a string giving the language.

id

a character giving a unique identifier for the created text document.

The function returns a MailDocument representing the text and metadata extracted from elem$content. The argument id is used as fallback if no corresponding metadata entry is found in elem$content.

Author(s)

Ingo Feinerer

See Also

Reader for basic information on the reader infrastructure employed by package tm.

strptime for date-time format specifications.

RFC 5322 (https://www.rfc-editor.org/rfc/rfc5322).

Examples

require("tm")
newsgroup <- system.file("mails", package = "tm.plugin.mail")
news <- VCorpus(DirSource(newsgroup),
                readerControl = list(reader = readMail))
inspect(news)

tm.plugin.mail documentation built on March 7, 2023, 3:16 p.m.