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...t; doesn't get called by a %*% b 5. S-Plus 6 compatibility issues a. S+4 and R use the function exists("function.name", mode="function") S+6 use the function existsFunction("function.name") More generally, S-Plus 6 has the following functions > objip("exists") $splus: [1] "exists" "existsFunction" "file.exists" $main: [1] "dbexists" "dbexistsOld" "dyn.exists" "existsClass" [5] "existsClassDef" "existsDoc" "exist...