In agusdon/fars-2: Analyzes data frm FARS

library(fars)
library(dplyr)
library(maps)

This vignette gives an overview of teh FARS package and the purpose of each function. Its functions analyze data from teh Fatality Analysis Reporting System (FARS) [[found here](http://www.nhtsa.gov/Data/Fatality-Analysis-Reporting-System-(FARS)]

Package functions

There are three exported functions for users:

• 'fars_read()'
• 'fars_summarize_years()'
• 'fars_map_state()'

A brief description with examples will be provided for each function. The FARS data for the examples can be found in the package directory under teh '\extdta' folder.

Read FARS data files

The function fars_read() reads data from a file path provided as an argument. It returns a tibble with the loaded data:

filename <- system.file("extdata/accident_2013.csv.bz2", package = "fars")
fars_read(filename)

Summarize number of accidents

The function fars_summarize_years() takes a vector or list of years (numeric/integer values) as an argument and if the corresponding files with data are available, it returns a pivot table with number of accidents per year and month. The data files need to be located in the working directory.

setwd(system.file("extdata", package = "fars"))
fars_summarize_years(2013:2015)

Plot accident locations

The last function available in the package, fars_map_state() takes a state index and year as arguments and returns a plot of the state with accident locations. The state indices need to correspond available indeces from the data set. Here are some examples:

setwd(system.file("extdata", package = "fars"))
fars_map_state(45, 2015)

The data files need to be located in the working directory

agusdon/fars-2 documentation built on May 10, 2019, 7:35 a.m.