1. A computer-implemented method for selecting electrical stimulation parameters for a leadwire implanted in patient tissue, the method comprising: iteratively performing the following for each of a plurality of values for a particular stimulation parameter, each value corresponding to a respective current field: positioning, by a computer processor, the current field at each of a respective plurality of locations about the leadwire; and for each of the respective plurality of locations, obtaining, by the processor, clinical effect information regarding a respective stimulation of the patient tissue produced by the respective current field at the respective location; and based on the obtained clinical effect information, identifying an optimal combination of a selected value for the particular stimulation parameter and selected location about the leadwire at which to perform a stimulation using the selected value using a graph that plots the obtained clinical effect information against values for the particular stimulation parameter and against locations about the leadwire including the locations to which the current fields had been positioned in the positioning steps.