SentimentDictionaryWeighted: Create a sentiment dictionary of words linked to a score

In SentimentAnalysis: Dictionary-Based Sentiment Analysis

Create a sentiment dictionary of words linked to a score

Description

This routine creates a new object of type SentimentDictionaryWeighted that contains a number of words, each linked to a continuous score (i.e. weight) for specifying its polarity. The scores can later be interpreted as a linear model

Usage

SentimentDictionaryWeighted(
  words,
  scores,
  idf = rep(1, length(words)),
  intercept = 0
)

Arguments

words	is collection (vector) of different words as strings
scores	are the corresponding scores or weights denoting the word's polarity
idf	provide further details on the frequency of words in the corpus as an additional source for normalization
intercept	is an optional parameter for shifting the zero level (default: 0)

Value

Returns a new object of type SentimentDictionaryWordlist

Note

The intercept is useful when the mean or median of a response variable is not exactly located at zero. For instance, stock market returns have slight positive bias.

Source

\Sexpr[results=rd]{tools:::Rd_expr_doi("10.1371/journal.pone.0209323")}

References

Pr\"ollochs and Feuerriegel (2018). Statistical inferences for Polarity Identification in Natural Language, PloS One 13(12).

See Also

SentimentDictionary

Examples

# generate dictionary (based on linear model)
d <- SentimentDictionaryWeighted(c("increase", "decrease", "exit"),
                                 c(+1, -1, -10),
                                 rep(NA, 3))
summary(d)
# alternative call
d <- SentimentDictionaryWeighted(c("increase", "decrease", "exit"),
                                 c(+1, -1, -10))
summary(d)
# alternative call
d <- SentimentDictionary(c("increase", "decrease", "exit"),
                         c(+1, -1, -10),
                         rep(NA, 3))
summary(d)                                

SentimentAnalysis documentation built on Aug. 24, 2023, 1:07 a.m.