Spider diagrams include REES, Wood, Thompson, Sun and McDonough etc.). CMAS projections include O'Hara, Walker, Grove, Baker and Eggler etc. the Irvine and Baragar (1971) rock classification scheme, are stored in control files that can be expanded easily. A calculator includes (+ - / *), Log, square, square root, ppm and chondrite functions. IgPet - commercial software from RockWare draws most types of petrologic diagrams, including Harker, Fenner, triangular and log plots.
