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Classification: A Mathematical Mapping
- Classification: predicts categorical class labels
- E.g., Personal homepage classification
- xi = (x1, x2, x3, …), yi = +1 or –1
- x1 : # of word “homepage”
- x2 : # of word “welcome”
- Mathematically, x ∈ X = R^n, y ∈ Y = {+1, –1},
- We want to derive a function f: X → Y
- Linear Classification
- Binary Classification problem
- Data above the red line belongs to class ‘x’
- Data below red line belongs to class ‘o’
- Examples: SVM, Perceptron, Probabilistic Classifiers
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