Create an object of class ggplot from DepthCurve and DepthCurveList.
getPlot(object)# S4 method for AsymmetryCurveList
getPlot(object)
# S4 method for DDPlot
getPlot(object)
# S4 method for ScaleCurveList
getPlot(object)
a DDPlot ScaleCurve or AsymmetryCurve object class.