1. A method for displaying a plurality of ordinate-abscissa value pairs via discrete display points in the abscissa direction and the ordinate direction, wherein each ordinate-abscissa value pair comprises an abscissa value and a respective ordinate value, the method comprising: determining an interpolated ordinate value at half abscissa spacing to the left and to the right of each abscissa value; determining a maximum ordinate value and a minimum ordinate value for each abscissa value based on the respective ordinate value, and based on the interpolated ordinate value to the left and the interpolated ordinate value to the right of the respective abscissa value; and determining a random or pseudo-random ordinate value for each abscissa value between the determined maximum ordinate value and the determined minimum ordinate value for the respective abscissa value, wherein an ordinate resolution of the display points is reduced by comparison with an ordinate resolution of the ordinate-abscissa value pairs.