1. A computer-implemented method for generating an analysis equation in an electronic-design-automation (EDA) environment, comprising: using one or more processors to display a first window in a graphical user interface (GUI) associated with the EDA environment, wherein the first window includes one or more graphical objects associated with a circuit design, and wherein the one or more graphical objects and associated electrical parameters are configured to be selected by a user using a first user-interface device; using the one or more processors to display a second window in the GUI, wherein the second window includes analysis operations that can be selected by the user; using the one or more processors to display a third window in the GUI, wherein the third window includes an equation editor; receiving a selection of one or more graphical objects and associated electrical parameters from the user; receiving a selection of an analysis operation from the user; and populating a symbolic representation of the analysis equation in the equation editor based on the selection of one or more graphical objects and associated electrical parameters and the selection of the analysis operation.