Now that we have covered everything, let's take a look at some external references for further reading:
Bivand, R. S., Pebesma, E. J., and Gómez-Rubio, V. Applied Spatial Data Analysis with R Second Edition. Springer. 2013.
Chang, W. R Graphics Cookbook. O'Reilly Media. 2012.
Cowpertwait, P. S. P. and Metcalfe, A. V. Introductory Time Series with R. Springer. 2009.
Diggle, P. and Ribeiro, P. J. Model-based Geostatistics. Springer. 2007.
Grolemund, G. and Wickham, H. "Dates and Times Made Easy with lubridate". Journal of Statistical Software. 2011. http://www.jstatsoft.org/v40/i03/paper.
Hengl, T. "A practical guide to geostatistical mapping of environmental variables". JRC Scientific and Technical Reports. 2007. http://spatial-analyst.net/book/.
Hengl, T., Roudier, P., Beaudette, D., and Pebesma, E. "plotKML: Scientific Visualization of Spatio-Temporal Data". Journal of Statistical Software. 2014. http://cran.r-project.org/web/packages/plotKML/vignettes/jss1079.pdf.
Kahle, D. and Wickham, H. "ggmap: Spatial Visualization with ggplot2". The R Journal. 2013. http://journal.r-project.org/archive/2013-1/kahle-wickham.pdf.
Lamigueiro, O. P. Displaying Time Series, Spatial, and Space-Time Data with R. CRC Press. 2014.
Murrell, P. Introduction to Data Technologies. CRC Press. 2009. https://www.stat.auckland.ac.nz/~paul/ItDT/.
Pebesma, E. "spacetime: Spatio-Temporal Data in R". Journal of Statistical Software. 2012. http://www.jstatsoft.org/v51/i07/paper.
Sarkar, D. Lattice: Multivariate Data Visualization with R. Springer. 2008.
Van der Loo, M. P. J. and de Jonge, E. Learning RStudio for R Statistical Computing. Packt Publishing. 2012.
Wickham, H. "Reshaping Data with the reshape Package". Journal of Statistical Software. 2007. http://www.jstatsoft.org/v21/i12/paper.
Wickham, H. ggplot2: Elegant Graphics for Data Analysis. Springer. 2009.
Wickham, H. "The Split-Apply-Combine Strategy for Data Analysis". Journal of Statistical Software. 2011. http://www.jstatsoft.org/v40/i01/paper.
Wickham, H. "Tidy Data". Journal of Statistical Software. 2014. http://www.jstatsoft.org/v59/i10/paper.
Wickham, H. Advanced R. CRC Press. 2014. http://adv-r.had.co.nz/.