rTutorial.R

# install.packages('devtools')
# if (packageVersion("devtools") < 1.6) {
#   install.packages("devtools")
# }
# devtools::install_github("hadley/lazyeval")
# devtools::install_github("hadley/dplyr")

# The r environment
# - how can r be used
# - custom interface


# libraries
library(readr)
library(dplyr)
library(ggplot2)

# Object types
# - numeric
# - character
# - logical


# Data structures and cohersion
# - vector and matrix
# - data.frame


# Importing and inspecting csv

# Selections in a data frame df[row, column]
# - by number
# - by name

# Dropping columns


# Manipulating the data with dplyr!

# - complex selections - ??select()

# - Piping!

# - arrange fars3 by fatalities in descending order

# - add a colum DATE to fars3 that is the full date year/month/day

# - summarize fars 4 by total fatalities and total drunk incidents, and its ratio


# Some simple graphics - fatalities in time

# - first we create a dataset and make a date object

# - let's group by date of the accident