Lecture 6 Classification Dr.李晓瑜Xiaoyu Li Email:xiaoyuuestc@uestc.edu.cn http://blog.sciencenet.cn/u/uestc2014xiaoyu 2019-Spring SunData Group http://www.sundatagroup.org School of Information and Software Engineering,UESTC 1966 Copyright2019 by Xiaoyu Li
Dr.李晓瑜 Xiaoyu Li Email：xiaoyuuestc@uestc.edu.cn http://blog.sciencenet.cn/u/uestc2014xiaoyu 2019-Spring Lecture 6 Classification SunData Group http://www.sundatagroup.org/ School of Information and Software Engineering, UESTC Copyright © 2019 by Xiaoyu Li. 1
Gunbata Groun Content (6H) 。6.1 Basic Concepts 6.2 Decision Tree Induction .6.3 Bayes Classification Methods .6.4 Rule-Based Classification .6.5 Model Evaluation and Selection 6.6 Techniques to Improve Classification accuracy 2 Copyright 2019 by Xiaoyu Li
Content（6H） 6.1 Basic Concepts 6.2 Decision Tree Induction 6.3 Bayes Classification Methods 6.4 Rule-Based Classification 6.5 Model Evaluation and Selection 6.6 Techniques to Improve Classification Accuracy Copyright © 2019 by Xiaoyu Li. 2
Basic Concepts 3 DATA Copyright 2019 by Xiaoyu Li
Copyright © 2019 by Xiaoyu Li. 3 Basic Concepts
1 What's Classification? .A bank loans officer loan application>safe or risky A marketing manager judge customer buy a new PC Medical researchers>breast cancer data>treatment 。→Data analysis task is Classification Classification is a form of data analysis that extracts models describing important data classes. Such models,called classifiers,predict categorical (discrete,unordered)class labels. ATA 4 Copyright 2019 by Xiaoyu Li
Copyright © 2019 by Xiaoyu Li. 4 1 What’s Classification? A bank loans officer → loan application→ safe or risky A marketing manager → judge customer buy a new PC Medical researchers→ breast cancer data→ treatment → Data analysis task is Classification Classification is a form of data analysis that extracts models describing important data classes. Such models, called classifiers, predict categorical (discrete, unordered) class labels
1 What's Classification? Prediction problems .(1)Classification .(2)Numeric Prediction DATA 5 Copyright 2019 by Xiaoyu Li
Copyright © 2019 by Xiaoyu Li. 5 1 What’s Classification? Prediction Problems (1) Classification (2) Numeric Prediction