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CLASSIFICATION BOUNDARIES. 姓名 : 吳思葦 學號 :601630402 課堂教授 : 魏世杰 報告日期 :102/12/3 1. Weka’s Boundary Visualizer for OneR. Open iris.2D.arff , a 2D dataset Weka GUI Chooser : Visualization > BoundaryVisualizer Open iris.2D.arff Note: petallength on X , petalwidth on Y

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classification boundaries

CLASSIFICATION BOUNDARIES

姓名:吳思葦

學號:601630402

課堂教授:魏世杰

報告日期:102/12/31

weka s boundary visualizer for oner
Weka’s Boundary Visualizer for OneR
  • Open iris.2D.arff , a 2D dataset
  • Weka GUI Chooser : Visualization >BoundaryVisualizer
    • Open iris.2D.arff
    • Note: petallength on X , petalwidth on Y
    • Choose rules > OneR
    • Check Plot training data
    • Click Start
    • In the Explorer , examine OneR’s rule
visualize boundaries for other schemes
Visualize boundaries for other schemes
  • Choose lazy>IBK
    • Plot training data ; click Start
    • K=5,20;note mixed colors
visualize boundaries for other schemes1
Visualize boundaries for other schemes
  • Choose bayes > NaiveBayes
    • Set useSupervisedDiscretization to true
visualize boundaries for other schemes2
Visualize boundaries for other schemes
  • Choose trees > J48
    • Relate the plot to Explorer output
classification boundaries1
CLASSIFICATION BOUNDARIES
  • Classifiers create boundaries in instance space
  • Different classifiers have different biases
  • Looked at OneR , IBK , NaiveBayes , J48
  • Visualization restricted to numeric attributes , and 2D plots
preprocessing
PREPROCESSING
  • Explorer可提供的資料預處理項目:
    • 離散化(Discretization)
    • 正規化(normalization)
    • 重新抽樣(resampling)
    • 屬性選擇(attribute selection)
    • 屬性轉換或合併(transforming and combining attributes)…
discretization
Discretization
  • Unsupervised
    • weka.filters.unsupervised.attribute.Discretize
      • equal-width (the default)
      • equal-frequency
  • Supervised
    • weka.filters.supervised.attribute.Discretize
attribute selection
Attribute Selection
  • 屬性評估器
    • 屬性子集評估器
    • 單一屬性評估器
  • 搜索方法
    • 搜索方法
    • 排序方法
attribute selection1
Attribute Selection
  • 屬性評估器
    • 屬性子集評估器
    • 單一屬性評估器
  • 搜索方法
    • 搜索方法
    • 排序方法
attribute selection2
Attribute Selection
  • 兩種屬性子集選取模式
    • 屬性子集評估器+搜索方法
    • 單一屬性評估器+排序方法
slide38
屬性子集評估器+搜索方法

搜索方法

BestFirst

ExhaustiveSearch

GeneticSearch

GreedyStepwise

RandomSearch

RankSearch

  • 屬性子集評估器
    • CfsSubsetEval
    • ClassifierSubsetEval
    • ConsistencySubsetEval
    • WrapperSubsetEval
slide39
單一屬性評估器+排序方法
  • 單一屬性評估器
    • ChiSquaredAttributeEval
    • GainRationAttributeEval
    • InfoGainAttributeEval
    • OneRAttributeEval
    • PrincipleComponents
    • ReliefAttributeEval
    • SymmetricalUncertAttributeEval
  • 排序方法
    • Ranker
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