DNA Optimization Threshold Autoregressive Prediction Model and Its Application in Ice Condition Time Series

Figure 2

The scatter plot of the conditional expectation: (a) 𝐸(𝑥(𝑖)/𝑥(𝑖−1)): 𝑥(𝑖−1); (b) 𝐸(𝑥(𝑖)/𝑥(𝑖−3)): 𝑥(𝑖−3); (c) 𝐸(𝑥(𝑖)/𝑥(𝑖−4)): 𝑥(𝑖−4).

(a) 𝑑=1

(b) 𝑑=3

(c) 𝑑=4