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While Finite Element analysis and that type of applications in general is not what AnyLogic is primarily designed for, you can do it using variables of Array type with dimensions of Range type. E.g. if you wish to explore the dynamics of a vibrating string, you can declare the dimension Element = range 0..99, variable Y[Element] for element coordinate, etc. The formulas then will look like d( Y[Element] ) / dt = V[Element]. AnyLogic 5 (previous version) did have a couple of FE examples: Vibrating String and Plate Heating (both should be online as applets). Please note that variable type Matrix that has been supported in version 5 is no longer supported in version 6 - arrays should be used instead.