In athos2113/FarsAnalysis2:

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)

The FarAnalysis2 Package reads data from the US National Highway Traffic Safety Administration's Fatality Analysis Reporting System, which is a nationwide census providing the American public yearly data regarding fatal injuries suffered in motor vehicle traffic crashes. You can download the data for this assignment here: DATASET . It then performs Basic Analysis on this dataset. The function fars_function finds the relevant dataset, manipulates it and maps the places where accidents have occured.

library(FarsAnalysis)

Package Dependencies

The FarsAnalysis2 package imports packages - readr, dplyr, tidyr. It imports functions from packages - maps, read_csv, points.

Export Functions

The FarAnalysis2 package comprises of several functions -

• fars_map_state
• fars_read
• fars_read_years
• fars_summarize_years
• make_filename

Using the Package

After importing the package, you can use the available functions -

1. make_filename Reads the input year and find the relevant dataset for that year. If the approriate year is not written, the sprintf function will return an error.It takes a numeric value of the year, used to find the relevant dataset. And, returns A character vector filename.

make_filename(2014)

2. fars_read_years Reads the year and finds the csv file matching the same year. If the csv file is not found, 'invalid year' error is displayed.If the year is appropriate, the csv file is read and mutate a new column with the year and then select the columns MONTH and year. A dataset with of the relevant year, with the columns MONTH and year is returned. Otherwise, an error 'invalid year' is displayed.

fars_read_years(c(2013, 2014)

3. fars_summarize_years The function reads the years as a numeric input.The function will read all the csv files found in the directory, using the fars_read_years function and bind them row-wise. It will then group the data based on year and MONTH and summarize the data.

 fars_summarize_years(c(2013,2014))

4. fars_map_state This function takes the state number and the vector of years as input. It will then find the relevant csv files using the make_filename function and will read those csv files using the fars_read function. If the state number is not found it will display an error. Otherwise, it will filter the dataset, filtering the data with the given state number. It then plots the points where the accidents have occured in that state. If no accidents occured, a message is displayed.

athos2113/FarsAnalysis2 documentation built on May 8, 2019, 2:42 p.m.