1. Winning Data Science Competitions Some (hopefully) useful pointers Owen Zhang Data Scientist 2. A plug for myself Current ● Chief Product Officer Previous ● VP, Science…

1. Random forests RUGS Data Mining with R Workshop II TOH Wei Zhong 15/7/2015 2. A little bit about me • Graduated from NUS, Computational biology • Statistics and computing…

Slide 1Trees Definition: A tree is a finite set of one or more nodes such that: –There is a specially designated node called the root. –The remaining nodes are partitioned…

Slide 1 Chapter 5 Slide 2 Trees Definition: A tree is a finite set of one or more nodes such that: –There is a specially designated node called the root. –The remaining…

Slide 1 Slide 2 Performance analysis of Alpha-Beta Pruning n Since alpha-beta pruning performs a minimax search while pruning much of the tree, its effect is to allow a deeper…

Chapter 5 Trees: Outline Introduction Representation Of Trees Binary Trees Binary Tree Traversals Additional Binary Tree Operations Threaded Binary Trees Heaps Binary Search…

Slide 1 Distributions of Randomized Backtrack Search Key Properties: I Erratic behavior of mean II Distributions have “heavy tails”. Slide 2 Median = 1! sample mean 3500!…

Performance analysis of Alpha-Beta Pruning Since alpha-beta pruning performs a minimax search while pruning much of the tree, its effect is to allow a deeper search with…

Slide 11 Data Mining Lecture 4: Decision Tree & Model Evaluation Slide 2 2 Practical Issues of Classification l Underfitting and Overfitting l Missing Values l Costs…

Chapter 5 Trees Definition: A tree is a finite set of one or more nodes such that: There is a specially designated node called the root. The remaining nodes are partitioned…