Checks whether one vector of relations is the inverse of another. Typically used to confirm that "above" and "below" columns match and will result in the same stratigraphic graph.

strat_is_mirror(units, relation1, relation2)

units | Vector of unit labels. |
---|---|

relation1 | First vector of relations. |

relation2 | Second vector of relations. |

`TRUE`

or `FALSE`

#> [1] TRUE