Section 4.2.1 of the article describes that "a new feature Δ𝑃𝑎𝑡v is constructed". Δ𝑃𝑎𝑡v is the differential feature obtained by subtracting the value at the previous moment from the current moment. So a sequence of length n can get n-1 features. How to supplement the missing one? In addition, the code does not reflect the constru
ction process of this Δ𝑃𝑎𝑡v.
Section 4.2.1 of the article describes that "a new feature Δ𝑃𝑎𝑡v is constructed". Δ𝑃𝑎𝑡v is the differential feature obtained by subtracting the value at the previous moment from the current moment. So a sequence of length n can get n-1 features. How to supplement the missing one? In addition, the code does not reflect the constru
ction process of this Δ𝑃𝑎𝑡v.