Tutorial _W10_slides (4)

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Dec 6, 2023

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IFN509 Data Exploration and Mining Week-10(Tutorial)-Predictive Modelling – Decision Tree Thiru Balasubramaniam
Lecture topic for Weeks 8- 11 Predictive Mining Predictive mining process Decision tree classification Linear and logistic regression Neural Networks K-nearest neighbour (a brief introduction)
Outline this week’s tutorial Part 1: Reflective Exercises(60 min) Exercise 1: Predictive mining Introduction: Basics Exercise 2: Predictive modelling - Process Exercise 3: Decision trees - Introduction Part 2: Practical Exercises(60 min) 1. Preparing data for predictive mining using ‘veteran.csv’ 2. Building your first decision tree model
Part 1: Reflective Exercises
Exercise 1: Predictive mining Introducti on: Basic 1. Compare Classification, Clustering and Association Mining Prediction Clustering Association Application Used in forecasting Used in description Used in description Techniques Decision trees, ANN, regression K-means, Hierarchical Apriori (generate and test), FP-tree on Type Supervised Unsupervised Unsupervised (Counting Frequencies) Measures Accuracy, R-sqaure, Precision, Recall, ROC curve Inter & Intra similarity: Silhouette coefficient Purity, Entropy Support, Confidence, Lif Output Prediction of a target variable; Rules, trees, networks Clusters Frequent patterns, association rules Input Multi-variables With class values (best if all filled) Dense data set Multi-variables Without class values (best if all filled) Dense data set Multi-variables (only very few present in a record) Sparse data set
Exercise 1: Predictive mining Introducti on: Basic 2. State the difference and similarity between classification rules and association rules. Classification Rules Focus on one target variable Need to specify class (or label) in all cases Only the class attribute (target) can be in RHS of the rule Measures: Accuracy, Comprehensibility Association Rules Many target variables Do not need to specify a class in any case Any combinations of attributes can be in RHS of the rule Measures: Support, Confidence, Lif
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