Description Usage Arguments Value Author(s) References See Also Examples
Given a set of lat-long coordinates for each voter, and a set of coordinates for all drop boxes or polling locations; OR a vector of haversine distances from nearest_dbox(), calculates the nearest drop box or polling location for each voter in kilometers.
1 |
lat1d_vec |
Numeric vector, latitude coordinate of voter |
lon1d_vec |
Numeric vector, longitude coordinate of voter |
lat2d_vec |
Numeric vector, latitude coordinate of drop box, polling location |
lon2d_vec |
Numeric vector, longitude coordinate of drop box, polling location |
num_vec |
Numeric vector, haversine output, default is NULL however. |
vec_only |
Logical, default is FALSE, set to TRUE if putting in Haversine output already calculated from nearest_dbox() |
A numeric vector of minimum distances for each voter to their nearest drop box or polling location, in kilometers
Loren Collingwood <loren.collingwood@ucr.edu>
Haversine: CC Robusto, 1957
dist_mile, nearest_dbox
1 2 3 4 5 6 7 8 9 10 11 12 | data(meck_ev)
# Voter and early vote location, Mecklenburg County
hav_meck <- nearest_dbox (voter_meck$lat, voter_meck$long,
early_meck$lat, early_meck$long)
summary(hav_meck)
hav_km <- dist_km(num_vec=hav_meck, vec_only=TRUE)
head(hav_km)
# Calculate mile distance directly
have_km2 <- dist_km (voter_meck$lat, voter_meck$long,
early_meck$lat, early_meck$long)
head(have_km2)
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