calc_dist
calculate distance between locations, taking a dataframe as
input. Distance can also be smoothed over the two steps before and after the
each point.
calc_dist(x, coord.names = c("x", "y"), smoothed = FALSE)
data.frame with locations
names of coordinates column in x
whether distance are smoothed or not
vector of distance
if (FALSE) calc_dist(df,coord.names = c("x","y"), smoothed = T)