set - set the object properties
    
  OBJ = OBJ.set(PARAM, VALUE) sets the parameter PARAM of OBJ
  to the value VALUE. PARAM must be a string indicating the
  parameter to be set.
 
  OBJ = OBJ.set(PARAM1, VALUE1, PARAM2, VALUE2....) sets all
  the desired parameters to the specified values.

Help for prtRvDiscrete/set is inherited from superclass prtAction