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A4.2 Data preprocessingA4.2.3

Importance of dimensionality reduction

Describe the importance of dimensionality reduction

AHL≈ 45 minCommand term: DescribePremium

In this lesson

  • Describing what dimensions are and the problems that many dimensions cause (the curse of dimensionality)
  • Describing how reducing the number of dimensions, while keeping the relevant information, helps machine learning

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What's inside

  1. LearnDimensions
  2. LearnThe curse of dimensionality
  3. LabAdd dimensions
  4. LearnReducing dimensions
  5. CheckQuick check
  6. ExamWorked exam answer
  7. ReviewMistakes examiners see
  8. Exam practiceExam-style questions

Ends with 3 exam-style questions worth 8 marks, with a self-marking markscheme.