term_intersect: Combine terms in a dtm

In kasperwelbers/RNewsflow: Tools for Comparing Text Messages Across Time and Media

Combine terms in a dtm

Description

Given a dtm and a similarity (adjacency) matrix, create a new column for each nonzero cell in the similarity matrix. For the term combinations (everything except the diagonal) the column names will be pasted together with a "&" separator (read as AND)

Usage

term_intersect(dtm, simmat, as_dfm = T, verbose = F, sep = " & ", par = NA)

Arguments

dtm	A quanteda dfm or a CsparseMatrix.
simmat	A similarity matrix in CsparseMatrix format. For instance, created with term_char_sim
as_dfm	If True, return as quanteda dfm
verbose	If True, report progress
sep	The separator used for pasting the terms
par	If TRUE, add parentheses to colnames before combining. This is mainly for internal use, as it allows specification if OR (term_union) and AND (term_intersect) operations are combined. If NA, this is based on whether parenthese are present.

Value

A CsparseMatrix or quanteda dfm

kasperwelbers/RNewsflow documentation built on April 8, 2024, 4:39 p.m.