fars_map_state: fars_map_state

In johnmwaugh/FarsPackage: Fatality Analysis Reporting System

Description

Uses maps to plot accident location on state map identified by STATE field enter state.num and year Includes helper functions make_filename() and fars_read() to read data for year entered. Checks state.num input is a valid identifier with Uses dplyr to filter by state number and create subset data.sub. If number of rows in subset == 0 (0L integer) then display message "no accidents to plot". Plots ponts (x,y) in subset on map where x latitude is > 90 and y longitude > 900 xlim and ylim functions set world coordinates use points function in graphics to set plot character type to 46 pch (a rectangle of side 0,01 inch)

Usage

fars_map_state(state.num, year)

Arguments

state.num	is an integer between 1 and 56
year	is a string identifying a year

Value

a map resembling a U.S state with plotted accident locations

Examples

fars_map_state(8, 2015)

johnmwaugh/FarsPackage documentation built on May 24, 2019, 4:06 a.m.