fars_read_years: Import data for multiple years

In kevin444/RpackageCoursera: Package for Coursera course entitled Building R Packages

Description

Import data for multiple years

Usage

fars_read_years(years)

Arguments

years

The list or vector of four-digit years for which you want to import information.

Value

This function returns a list in which each element corresponds to an element in the argument "years." For each valid year in "years," the corresponding element of the list will be a tibble with rows equal to the number of observations and two columns: MONTH and year.

If an invalid year is provided as an argument, the corresponding element of the returned list will be NULL. A warning message will then print: Warning message: In value[[3L]](cond) : invalid year

Examples

## Not run: 
fars_read_years(2015)
fars_read_years(c(2013, 2014))
fars_read_years(c(2013, "invalid input"))

## End(Not run)

kevin444/RpackageCoursera documentation built on June 29, 2020, 12:54 a.m.