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.

inverse_index(corpus)

update_inverse_index(corpus)

# S3 method for corpus
inverse_index(corpus)

# S3 method for corpus
update_inverse_index(corpus)

inverse_index(corpus)

# S3 method for 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)
# }
# 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) # }