CUDT: A CUDA Based Decision Tree Algorithm

Algorithm 1

The definition of prefix-sum.

Given an array 𝐴 of 𝑛 elements

𝐴=[𝑎₀,𝑎₁,…,𝑎_𝑛−1]

Given a binary operator ⊚

Given I as identify of ⊚

Scan(𝐴)=[𝐼,𝑎₀,𝑎₀+𝑎₁,…,(𝑎₀+𝑎₁+⋯+𝑎_𝑛−2)]