To asses the size of this error the values of the curve
in equation (7.1) were calculated,
using the typical
parameters: 
, 
,
,
and c=128, at times 
, i = 1, 2, ..., 1000.
The sum of the square of the difference between these 1000 values and their
nearest integer value was then calculated and found to be 60.2. This is
the value of e produced solely by the spatially discrete nature of
the model. The values of e obtained from the curve fitting
process are not significantly larger suggesting that
equation (7.1) correctly describes the
interface and that the fitted parameters are
reasonably accurate.