Calculate total miles traveled from vectors of lat / lon

Question

I have a data frame with data about a driver and the route they followed. I\'m trying to figure out the total mileage traveled. I\'m using the geosphere packa

Answer 1

Be VERY careful with missing data, as distVincentyEllipsoid() returns 0 for distance between any two points with missing coordinates c(NA, NA), c(NA, NA).