References

• NCSS, & LLC. (n.d.). NCSS Statistical Software NCSS.com 206-1 Two-Sample T-Test, 1–39. Retrieved from https://ncss-wpengine.netdna-ssl.com/wp-content/themes/ncss/pdf/Procedures/NCSS/Two-Sample_T-Test.pdf

• R4V Response for Venezuelans. (2019, August 1). 62. Retrieved from https://r4v.info/es/documents/download/67282

• Silge J., Robinson D. (2017). Text mining with R: A tidy approach. O’Reilly Media, Inc.

• Stevenson, M. (2019, Jan 26). Text Analysis with tidytext. Retrieved July 18, 2019, from https://markrstevenson.com/blog/wXMUdQCIfHqwTzrnProy

• Raja, A. M. (2018, Mar 21). Introducing udpipe for easy Natural Language Processing in R. Retrieved September 6, 2019 from https://datascienceplus.com/introducing-udpipe-for-easy-natural-language-processing-in-r/

Package references

• Wickham H, Hester J, Chang W (2019). devtools: Tools to Make Developing R Packages Easier. R package version 2.2.1, <URL: https://CRAN.R-project.org/package=devtools>.

• Xie Y (2019). knitr: A General-Purpose Package for Dynamic Report Generation in R. R package version 1.24, <URL: https://yihui.name/knitr/>.

• Xie Y (2015). Dynamic Documents with R and knitr, 2nd edition. Chapman and Hall/CRC, Boca Raton, Florida. ISBN 978-1498716963, <URL: https://yihui.name/knitr/>.

• Xie Y (2014). “knitr: A Comprehensive Tool for Reproducible Research in R.” In Stodden V, Leisch F, Peng RD (eds.), Implementing Reproducible Computational Research. Chapman and Hall/CRC. ISBN 978-1466561595, <URL: http://www.crcpress.com/product/isbn/9781466561595>.

• Ooms J (2014). “The jsonlite Package: A Practical and Consistent Mapping Between JSON Data and R Objects.” arXiv:1403.2805 [stat.CO]. <URL: https://arxiv.org/abs/1403.2805>.

• Wickham H (2017). tidyverse: Easily Install and Load the ‘Tidyverse’. R package version 1.2.1, <URL: https://CRAN.R-project.org/package=tidyverse>.

• Wickham H (2019). conflicted: An Alternative Conflict Resolution Strategy. R package version 1.0.4, <URL: https://CRAN.R-project.org/package=conflicted>.

• Silge J, Robinson D (2016). “tidytext: Text Mining and Analysis Using Tidy Data Principles in R.” JOSS, 1(3). doi: 10.21105/joss.00037 (URL: https://doi.org/10.21105/joss.00037), <URL: http://dx.doi.org/10.21105/joss.00037>.

• Wang E, Cook D, Hyndman RJ (2019). “A new tidy data structure to support exploration and modeling of temporal data.” arXiv:1901.10257.

• Wickham H (2018). scales: Scale Functions for Visualization. R package version 1.0.0, <URL: https://CRAN.R-project.org/package=scales>.

• Wilkins D (2019). treemapify: Draw Treemaps in ‘ggplot2’. R package version 2.5.3, <URL: https://CRAN.R-project.org/package=treemapify>.

• Ooms J (2018). hunspell: High-Performance Stemmer, Tokenizer, and Spell Checker. R package version 3.0, <URL: https://CRAN.R-project.org/package=hunspell>.

• Perry PO (2017). corpus: Text Corpus Analysis. R package version 0.10.0, <URL: https://CRAN.R-project.org/package=corpus>.

• Fellows I (2018). wordcloud: Word Clouds. R package version 2.6, <URL: https://CRAN.R-project.org/package=wordcloud>.

• Wilke C (2019). cowplot: Streamlined Plot Theme and Plot Annotations for ‘ggplot2’. R package version 1.0.0, <URL: https://CRAN.R-project.org/package=cowplot>.

• Xie Y (2019). bookdown: Authoring Books and Technical Documents with R Markdown. R package version 0.13, <URL: https://github.com/rstudio/bookdown>.

• Xie Y (2016). bookdown: Authoring Books and Technical Documents with R Markdown. Chapman and Hall/CRC, Boca Raton, Florida. ISBN 978-1138700109, <URL: https://github.com/rstudio/bookdown>.

• Muir C (2018). refinr: Cluster and Merge Similar Values Within a Character Vector. R package version 0.3.1, <URL: https://CRAN.R-project.org/package=refinr>.

• Wijffels J (2019). udpipe: Tokenization, Parts of Speech Tagging, Lemmatization and Dependency Parsing with the ‘UDPipe’ ‘NLP’ Toolkit. R package version 0.8.3, <URL: https://CRAN.R-project.org/package=udpipe>.

• Yutani H (2018). gghighlight: Highlight Lines and Points in ‘ggplot2’. R package version 0.1.0, <URL: https://CRAN.R-project.org/package=gghighlight>.

• Pedersen T (2019). ggforce: Accelerating ‘ggplot2’. R package version 0.3.1, <URL: https://CRAN.R-project.org/package=ggforce>.

• Robinson D, Hayes A (2019). broom: Convert Statistical Analysis Objects into Tidy Tibbles. R package version 0.5.2, <URL: https://CRAN.R-project.org/package=broom>.

• Csardi G, Nepusz T (2006). “The igraph software package for complex network research.” InterJournal, Complex Systems,

1695. <URL: http://igraph.org>.

• Pedersen TL (2018). ggraph: An Implementation of Grammar of Graphics for Graphs and Networks. R package version 1.0.2, <URL: https://CRAN.R-project.org/package=ggraph>.