10 References

Abelson, Hal. 2008. “Foreword.” In Essentials of Programming Languages, 3rd Edition, 3rd ed. The MIT Press.
Arnold, Taylor B. 2016. cleanNLP: A Tidy Data Model for Natural Language Processing. https://cran.r-project.org/package=cleanNLP.
Arnold, Taylor, and Lauren Tilton. 2016. coreNLP: Wrappers Around Stanford CoreNLP Tools. https://cran.r-project.org/package=coreNLP.
Benoit, Kenneth, and Paul Nulty. 2016. quanteda: Quantitative Analysis of Textual Data. https://CRAN.R-project.org/package=quanteda.
Feinerer, Ingo, Kurt Hornik, and David Meyer. 2008. “Text Mining Infrastructure in r.” Journal of Statistical Software 25 (5): 1–54. http://www.jstatsoft.org/v25/i05/.
Henry, Lionel, and Hadley Wickham. 2018. Purrr: Functional Programming Tools. https://CRAN.R-project.org/package=purrr.
Loughran, Tim, and Bill McDonald. 2011. “When Is a Liability Not a Liability? Textual Analysis, Dictionaries, and 10-Ks.” The Journal of Finance 66 (1): 35–65. https://doi.org/10.1111/j.1540-6261.2010.01625.x.
Mimno, David. 2013. mallet: A Wrapper Around the Java Machine Learning Tool MALLET. https://cran.r-project.org/package=mallet.
Mullen, Lincoln. 2016. tokenizers: A Consistent Interface to Tokenize Natural Language Text. https://CRAN.R-project.org/package=tokenizers.
Pedersen, Thomas Lin. 2017. ggraph: An Implementation of Grammar of Graphics for Graphs and Networks. https://cran.r-project.org/package=ggraph.
Rinker, Tyler W. 2017. sentimentr: Calculate Text Polarity Sentiment. Buffalo, New York: University at Buffalo/SUNY. http://github.com/trinker/sentimentr.
Robinson, David. 2016. gutenbergr: Download and Process Public Domain Works from Project Gutenberg. https://cran.rstudio.com/package=gutenbergr.
———. 2017. broom: Convert Statistical Analysis Objects into Tidy Data Frames. https://CRAN.R-project.org/package=broom.
Silge, Julia. 2016. janeaustenr: Jane Austen’s Complete Novels. https://CRAN.R-project.org/package=janeaustenr.
Silge, Julia, and David Robinson. 2016. tidytext: Text Mining and Analysis Using Tidy Data Principles in r.” JOSS 1 (3). https://doi.org/10.21105/joss.00037.
Wickham, Hadley. 2007. “Reshaping Data with the reshape Package.” Journal of Statistical Software 21 (12): 1–20. http://www.jstatsoft.org/v21/i12/.
———. 2009. ggplot2: Elegant Graphics for Data Analysis. Springer-Verlag New York. http://ggplot2.org.
———. 2014. “Tidy Data.” Journal of Statistical Software 59 (1): 1–23. https://doi.org/10.18637/jss.v059.i10.
———. 2016. tidyr: Easily Tidy Data with ‘Spread()‘ and ‘Gather()‘ Functions. https://CRAN.R-project.org/package=tidyr.
Wickham, Hadley, and Romain Francois. 2016. dplyr: A Grammar of Data Manipulation. https://CRAN.R-project.org/package=dplyr.