4. The non-transitory computer-readable medium of claim 1 , further comprising: one or more instructions for generating code based on the graphical model and the symbolic expression in the graphical model, the generated code preserving the symbolic expression and the propagated symbolic expression.
4. The non-transitory computer-readable medium of claim 1 , further comprising: one or more instructions for generating code based on the graphical model and the symbolic expression in the graphical model, the generated code preserving the symbolic expression and the propagated symbolic expression. 5. The non-transitory computer-readable medium of claim 4 , further comprising: one or more instructions for receiving a value for the symbolic expression in the graphical model, one or more instructions for substituting the received value for the symbolic expression in the generated code, and one or more instructions for compiling an executable code using the received values.