Gets the value for *field* for parameter indexed by
        *row*
        
        :param row: the ith parameter number
        :type row: int
        :param field: detail of the parameter to set
        :type field: str
        :returns: value -- type appropriate to parameter

def paramValue(self, row, field):
        """Gets the value for *field* for parameter indexed by
        *row*
        
        :param row: the ith parameter number
        :type row: int
        :param field: detail of the parameter to set
        :type field: str
        :returns: value -- type appropriate to parameter
        """
        if field == 'nsteps':
            return self.numSteps(row)
        if field in ['start', 'stop', 'step'] and self._parameters[row]['parameter'] == 'filename':
                return '-'
        else:
            param = self._parameters[row]
            return param[field]