intersection — Set intersection


\begin{rail} Intersection : 'intersection' '(' Matrix ',' Matrix ')' ; \end{rail}
intersection calculates the intersection of the two sets supplied as arguments. The intersection of two sets is just the items that are common to both. $\Longrightarrow$ This is not an built-in function. This function is normally loaded on start-up from the intersection.r file in the standard rlib directory. Use of the -r option, incorrectly setting the RLAB_LIB_DIR environmental variable, or modifying intersection.r may make this function unavailable.
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