README.md

In JayLKim/farsCoursera: Playing with the FARS data (for a Coursera assignment)

farsCoursera

Overview

This package allow you to import and summarize data from the Fatality Analysis Reporting System. You can also map the locations of accidents on a state map.

Installation

You can install this package directly from GitHub.

install.packages("devtools")
devtools::install_github("JayLKim/farsCoursera")

Usage

We need to assume that we already have downloaded a data file at the current working directory.

• Data import (fars_read_years())

If you input a vector of years, you can get a tibble of all cases.

fars_read_years(c(2013, 2014))
#> [[1]]
#> # A tibble: 30,202 × 2
#>    MONTH  year
#>    <int> <dbl>
#> 1      1  2013
#> 2      1  2013
#> 3      1  2013
#> 4      1  2013
#> 5      1  2013
#> 6      1  2013
#> 7      1  2013
#> 8      1  2013
#> 9      1  2013
#> 10     1  2013
#> # ... with 30,192 more rows
#> 
#> [[2]]
#> # A tibble: 30,056 × 2
#>    MONTH  year
#>    <int> <dbl>
#> 1      1  2014
#> 2      1  2014
#> 3      1  2014
#> 4      1  2014
#> 5      1  2014
#> 6      1  2014
#> 7      1  2014
#> 8      1  2014
#> 9      1  2014
#> 10     1  2014
#> # ... with 30,046 more rows

• Data summary (fars_summarize_years())

This function summarizes the data you imported. It returns a tibble representing the number of cases per month for a given year.

fars_summarize_years(c(2013, 2014, 2015))
#> # A tibble: 12 × 4
#>    MONTH `2013` `2014` `2015`
#> *  <int>  <int>  <int>  <int>
#> 1      1   2230   2168   2368
#> 2      2   1952   1893   1968
#> 3      3   2356   2245   2385
#> 4      4   2300   2308   2430
#> 5      5   2532   2596   2847
#> 6      6   2692   2583   2765
#> 7      7   2660   2696   2998
#> 8      8   2899   2800   3016
#> 9      9   2741   2618   2865
#> 10    10   2768   2831   3019
#> 11    11   2615   2714   2724
#> 12    12   2457   2604   2781

• Accidents map (fars_map_state())

You can map the locations of accidents on a state map. Let's draw an accident map of Florida in 2013. (See this link for a state.num)

fars_map_state(state.num = 12, year = 2013)

-1.png)

JayLKim/farsCoursera documentation built on May 7, 2019, 10:33 a.m.