Computer Science · Theme A: Concepts of computer science

A4.2 — Data preprocessing

Computer Science · SL / HL · syllabus-mapped notes

1. CS_A4.2.1

   The significance of data cleaning

   How data quality drives model performance, plus cleaning, normalization and standardization.

2. CS_A4.2.2

   The role of feature selection

   Retaining the most informative attributes via filter, wrapper and embedded methods.

3. CS_A4.2.3

   The importance of dimensionality reduction

   Reducing variables and the curse of dimensionality (PCA and LDA are out of scope).