Dictionary-Based Methods

1) Corpus-Specific

2) General (e.g. LIWC)

3) Sentiment Analysis

my_negative_words<-c("failing","bad","badly",
"sad","angry","pathetic")

library(stringr)
Negative_Tweets<-Twitter_Dataset
[str_detect(Twitter_Dataset$tweets, my_negative_words),]

Source: http://homepages.dcc.ufmg.br/~fabricio/download/cosn127-goncalves.pdf

The quality of dictionary-based methods depends upon the match between the learning-corpus and the one you want to code.

The quality of dictionary-based methods depends upon the match between the learning-corpus and the one you want to code.

Creating your own is often a good solution, but it is very time intensive.