In aalvaradob/Prueba1: FARS Functions Package for Coursera Course

This is the Vignette created for the package "Fars Functions"" as part of the coursera "Building an R Package" course.

The functions use 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.

Functions that are part of the package

1. fars_map_state
2. fars_read
3. fars_read_years
4. fars_summarize_years
5. make_filename

1-fars_map_state

Description: This function takes a year and state numbers and create a graph with the Highway Traffic Fatality located by longitud and latitude. The function will provide the warnings and messages included in the fars_read and make_file.

Example on how it should be used:

setwd("~/Desktop/COURSERA/R Software Develpment specialization/Course3/1 test/data1/data")
library(Prueba1)
fars_map_state(c(20,33,48), c(2013,2014,2015))

2-fars_read

Description: This function takes as "input" the name of the file and return a dataframe using the readr::read_csv function.

Example on how it should be used:

setwd("~/Desktop/COURSERA/R Software Develpment specialization/Course3/1 test/data1/data")
library(Prueba1)
fars_read("accident_2013d.csv.bz2")

3-fars_read_years

Description: This function takes a vector of years as input, and them select the year and month information contained in the files (like "accident_YYYYd.csv.bz2") saved in the working directory. The files will be the ones where the name includes one of the years provided, after appliying the "make_filename" function.

Example on how it should be used:

setwd("~/Desktop/COURSERA/R Software Develpment specialization/Course3/1 test/data1/data")
library(Prueba1)
fars_read_years(c(2013,2014,2015))

4-fars_summarize_years

Description: This function takes a vector of years, select and summarize the observations by year and month contained in the files "accident_YYYYd.csv.bz2". The function will provide the warnings and messages included in the fars_read and fars_read_years functions.

Example on how it should be used:

setwd("~/Desktop/COURSERA/R Software Develpment specialization/Course3/1 test/data1/data")
library(Prueba1)
fars_summarize_years (c(2013,2014,2015))

5-make_filename

Description: This function create a file name based on a given "year" that is part of the file name. Example on how it should be used:

setwd("~/Desktop/COURSERA/R Software Develpment specialization/Course3/1 test/data1/data")
library(Prueba1)
example1<-make_filename(2013)
example1

aalvaradob/Prueba1 documentation built on May 9, 2019, 12:52 p.m.