quanteda (version 0.99)

as.list.dist: coerce a dist object into a list

Description

Coerce a dist matrix into a list of selected target terms and similar terms, in descending order of similarity. Can be used after calling textstat_simil or textstat_dist.

Usage

# S3 method for dist
as.list(x, sorted = TRUE, n = NULL, ...)

Arguments

x

dist class object

sorted

sort results in descending order if TRUE

n

the top n highest-ranking items will be returned. If n is NULL, return all items.

...

unused

Examples

# NOT RUN {
## compare to tm

# tm version
require(tm)
data("crude")
crude <- tm_map(crude, content_transformer(tolower))
crude <- tm_map(crude, remove_punctuation)
crude <- tm_map(crude, remove_numbers)
crude <- tm_map(crude, stemDocument)
tdm <- TermDocumentMatrix(crude)
findAssocs(tdm, c("oil", "opec", "xyz"), c(0.75, 0.82, 0.1))

# in quanteda
quantedaDfm <- as.dfm(t(as.matrix(tdm)))
as.list(textstat_simil(quantedaDfm, c("oil", "opec", "xyz"), margin = "features"), n = 14)

# in base R
corMat <- as.matrix(proxy::simil(as.matrix(quantedaDfm), by_rows = FALSE))
round(head(sort(corMat[, "oil"], decreasing = TRUE), 14), 2)
round(head(sort(corMat[, "opec"], decreasing = TRUE), 9), 2)
# }