## ----eval=FALSE--------------------------------------------------------------- ## library(ggplot2) ## ----message=FALSE------------------------------------------------------------ library(nycflights13) library(dplyr) library(knitr) ## ----load_flights------------------------------------------------------------- flights ## ----------------------------------------------------------------------------- glimpse(flights) ## ----eval=FALSE--------------------------------------------------------------- ## airlines ## kable(airlines) ## ----eval=FALSE--------------------------------------------------------------- ## airlines$name ## ----------------------------------------------------------------------------- glimpse(airports) ## ----eval=FALSE--------------------------------------------------------------- ## ?flights