
The same RK-4 integration method and step size were used to numerically integrate the discrete-
time signal (1 a)m(i) þcx
1
(i)x
2
(i) to generate s(i).
A valuable c heck on the accuracy of the simulation is possible. Conservation of individuals
can be verified at every discrete point in time. In this case, the total number of individuals begins at
10 million and increases at a rate of 2500 per week for 8 weeks. Hence, after approximately
2 months, the total population consists of 10,020,000 people distributed among the five states x
1
, x
2
,
x
3
, x
4
, and x
5
. Summing x
1
(200), x
2
(200), x
3
(200), x
4
(200), and x
5
(200) in each column of Table
6.12 will show that ...