1. A computer-implemented method for creating and using a bus signal in a graphical modeling environment comprising: interacting with a graphical model of a dynamic system in a graphical modeling environment executing on a computing device, the graphical modeling environment using information in the graphical model to simulate behavior of the dynamic system; grouping in the graphical modeling environment a first data signal of a first signal type and a second data signal of a second signal type to form a bus signal in the graphical model, the first signal type differing from the second signal type in at least one of data type, dimension or complexity; providing the bus signal in the graphical model as input to a non-virtual operation block; and performing an operation on the bus signal using the non-virtual operation block.