extract_context {poldis}

Extract context for string matches

Description

A function for getting string matches and the context in which they occur.

Usage

extract_context(match, v, level = "sentences", n = 1)

Arguments

match

Character string to be matched. For multiple strings, please use "|" as a separator.

v

Text vector or annotated data frame.

level

At which text level do you want matches to be returned? Defaults to "sentences". Options are sentences, words, and paragraph.

n

Number of sentences or words matched before and after string match. Defaults to 1. That is, one word or one sentence before, and after, string match. For paragraphs, n is always set to one.

Value

A list of string matches and their context.

Examples

extract_context(match = "war|weapons of mass destruction|conflict|NATO|peace",
                v = US_News_Conferences_1960_1980$text[100],
                level = "sentences", n = 2)