inverse_index: Inverse Index

In news-r/textanalysis: Text analysis

Description

If we are interested in a specific term, we often want to know which documents in a corpus contain that term. The inverse index tells us this and therefore provides a simplistic sort of search algorithm.

Tells the size of the inverse index.

Usage

inverse_index(corpus)

update_inverse_index(corpus)

## S3 method for class 'corpus'
inverse_index(corpus)

## S3 method for class 'corpus'
update_inverse_index(corpus)

inverse_index(corpus)

## S3 method for class 'corpus'
inverse_index(corpus)

Arguments

corpus

A corpus, as returned vy corpus.

Examples

## Not run: 
init_textanalysis()

# build document
doc1 <- string_document("First document.")
doc2 <- string_document("Second document.")

# do not update automatically
corpus <- corpus(doc1, doc2, update_inverse_index = FALSE)

# update manually
update_inverse_index(corpus)
inverse_index(corpus)

## End(Not run)

## Not run: 
init_textanalysis()

# build document
doc1 <- string_document("First document.")
doc2 <- string_document("Second document.")

corpus <- corpus(doc1, doc2)

update_inverse_index(corpus)
inverse_index(corpus)

## End(Not run)

news-r/textanalysis documentation built on Nov. 4, 2019, 9:40 p.m.