Does PCA require the features to be on the same scale?

  • Depends on the algorithm used
  • Depends on the data
  • No
  • Yes
Yes, PCA requires the features to be on the same scale. If features are on different scales, PCA might end up giving higher weightage to features with higher variance, which could lead to incorrect principal components. So, it's typically a good practice to standardize the data before applying PCA.
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