- Selcted References.
- [1] https://www.rstudio.com/wp-content/uploads/2015/02/rmarkdown-cheatsheet.pdf
- [2] https://cran.r-project.org/web/packages/gridExtra/gridExtra.pdf
- [3] https://cran.r-project.org/web/packages/ggthemes/vignettes/ggthemes.html
- [4] http://www.cookbook-r.com/Graphs/Facets_(ggplot2)/
- [5] https://datavizcatalogue.com/methods/density_plot.html
- [6] https://www.r-bloggers.com/dplyr-example-1/
- [7] http://htmlcolorcodes.com/
- [8] http://waterhouse.ucdavis.edu/@@search?SearchableText=acidity
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