tm (version 0.7-12)

DataframeSource: Data Frame Source

Description

Create a data frame source.

Usage

DataframeSource(x)

Value

An object inheriting from DataframeSource, SimpleSource, and Source.

Arguments

x

A data frame giving the texts and metadata.

Details

A data frame source interprets each row of the data frame x as a document. The first column must be named "doc_id" and contain a unique string identifier for each document. The second column must be named "text" and contain a UTF-8 encoded string representing the document's content. Optional additional columns are used as document level metadata.

See Also

Source for basic information on the source infrastructure employed by package tm, and meta for types of metadata.

readtext for reading in a text in multiple formats suitable to be processed by DataframeSource.

Examples

docs <- data.frame(doc_id = c("doc_1", "doc_2"),
                   text = c("This is a text.", "This another one."),
                   dmeta1 = 1:2, dmeta2 = letters[1:2],
                   stringsAsFactors = FALSE)
(ds <- DataframeSource(docs))
x <- Corpus(ds)
inspect(x)
meta(x)