knitr::opts_chunk$set( collapse = TRUE, comment = "#>" )
The document introduces the package FarsFunctions. The packages loads and analyzes data from US National Highway Traffic Safety Administration's Fatality Analysis Reporting System (FARS).
The package provides the following functions:
fars_summarize_years() calculates the number of accidents per month for the particular years
fars_map_state() maps the accidents for a given US state and year
These functions builds on basic functions to read files, make file names and read years:
make_filename() creates the name of the files that holds the data of a year.
fars_read() reads a fars file, file name can me provided by make_filename.
fars_read_years() reads fars file for multiple years.
fars_summarize_years() calculates the number of accidents per month for the particular year(s).
For example, the following command gives the number of accidents per months for year 2013.
fars_summarize_years(years=2013)
fars_map_state() maps the accidents for a given US state and in a given year.
For example, you can map the road fatality for State X in year 2013 with:
fars_map_state(state.num = 10, year = 2013)
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