In ilikefishes/farspackage: Building R Packages Final Assignment

suppressMessages(library(farspackage))
suppressMessages(library(dplyr))
suppressMessages(library(maps))

Package Description

The farspackage contains various functions to read from file, summarize, and map data from the US National Highway Traffic Safety Administration's Fatality Analysis Reporting System

This data encompasses the yearly data regarding fatal injuries suffered in motor vehicle traffic crashes.

farspackage Functions

make_filename()

This function will create a file name using the year argument that will be compatible for use in the other farspackage functions. If a string in integer format is passed, it will be converted to an integer to avoid NA's by coercion.

make_filename(2014)

fars_read()

This function will create a tibble data.frame based on a FARS filename passed as the filename argument. If the filename does not exist, an error will be thrown advising it does not exist.

fars_read("accident_2014.csv.bz2")

fars_read_years()

This function will return a list of month and years for all rows that are present in a FARS data set. The years argument can be a vector or list of year in integer format. An error will be thrown if a year and corresponding file does not exist.

fars_read_years(2014)

fars_summarize_years()

This function will return a summary of total number of fatalities per month and year. The years argument can be a vector or list of year(s) in integer format.

fars_summarize_years(2014)

fars_map_state()

This function will create a map of fatal accidents based on the state.num and year arguments. An error will be thrown if an invalid state number is provided. A message will also be printed if there are zero fatalities to map.