union — Union of two sets

The union function returns a vector set that is the union of the two sets supplied as arguments. A set is just a row or column vector. $\Longrightarrow$ This is not an built-in function. This function is normally loaded on start-up from the union.r file in the standard rlib directory. Use of the -r option, incorrectly setting the RLAB_LIB_DIR environmental variable, or modifying union.r may make this function unavailable.