Given a set of cartesian coordinates representing the locations of different objects, this function determines the nearest neighboring object of each object.

nn(x, y, id, geo = FALSE)

x | A vector of x (or longitude) coordinates. |
---|---|

y | A vector of y (or latitude) coordinates. |

id | A vector corresponding to the unique identities of each track. |

geo | A logical value indicating whether the locations are defined by geographic coordinates (pairs of longitude/latitude values). Default: FALSE. |

A vector of the same length as x and y representing the identity of the nearest neighboring object to each object.

`nn`

, `nnd`

# TODO