Table 4.

Two-gene system: comparison of average errors for RK3/8, expRK3/8, RK4, and expRK4 methods.

Step size	RK3/8	expRK3/8	RK4	expRK4
1	4.6619 × 10−2	8.7331 × 10−4	8.6240 × 10−3	9.7906 × 10−4
1/2	3.7028 × 10−1	9.4577 × 10−4	5.2468 × 10−1	9.4457 × 10−4
1/4	3.2666 × 10−1	9.4805 × 10−4	3.6973 × 10−1	9.4766 × 10−4
1/8	1.3398 × 10−1	9.4894 × 10−4	1.4412 × 10−1	9.4891 × 10−4
1/16	4.4359 × 10−2	9.4947 × 10−4	4.5572 × 10−2	9.4947 × 10−4
1/32	1.7338 × 10−2	9.4974 × 10−4	1.7525 × 10−2	9.4974 × 10−4