data.table and dplyr take data frames up a notch! https://github.com/Rdatatable/data.table/wiki/Getting-started https://github.com/Rdatatable/data.table/wiki/G

data.table and dplyr take data frames up a notch! https://github.com/Rdatatable/data.table/wiki/Getting-started https://github.com/Rdatatable/data.table/wiki/Getting-starte... https://cran.rstudio.com/web/packages/dplyr/vignettes/introduction.html https://cran.rstudio.com/web/packages/dplyr/vignettes/introd... xts is quite useful as well, when you need to do modeling/analysis in an especially time-oriented manner: http://joshuaulrich.github.io/xts/ http://joshuaulrich.github.io/xts/