sentence: new objective functions for nexus can be defined using conditional expressions ; external c , c++ , java or python code ; through matlab or microsoft excel or other means , such as nastran or radioss ( finite element method ) , catia ( cad / cam ) , and ( ansys fluent or abaqus cae software , etc. grapheme with its data filtering and manipulation capabilities , along with interactive , responsive plotting functionality , ichrome 's grapheme is intended to help explore and understand large , complex data sets .