medium10 pts · first answer countsdimensionality-reductionfeature-scaling

PCA on unscaled features

You run PCA on features measured in very different units, such as revenue in dollars and rating from 1 to 5, without scaling. What happens?

A.PCA ignores units, so nothing changesB.PCA fails with an errorC.All components explain the same varianceD.The first component is dominated by the large-scale feature

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PCA on unscaled features

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