Code examples and expansions from the book: Text Mining with R: A Tidy Approach by Julia Silge and David Robinson.
Anything quoted but not referenced in this repository is from this book - as are most of the figure and table captions.
Some of the code references the following cited lexicons:
Saif M. Mohammad and Peter Turney. (2013), "Crowdsourcing a Word-Emotion Association Lexicon." Computational Intelligence, 29(3): 436-465.
Finn Årup Nielsen. (2011), "A new {ANEW}: Evaluation of a word list for sentiment analysis in microblogs" Proceedings of the ESWC2011 Workshop on 'Making Sense of Microposts': Big things come in small packages 718 in {CEUR} Workshop Proceedings : 93-98. 2011 May. http://arxiv.org/abs/1103.2903
Bing Liu and collaborators, "Opinion Mining, Sentiment Analysis, and Opinion Spam Detection: Feature-Based Opinion Mining and Summarization (or Aspect-Based Sentiment Analysis and Summarization)"