Describe the cloud along its main direction

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Could We Describe the Same Cloud with Fewer Measurements?

Part 1 of 3

Imagine measuring several aspects of the same objects. If two measurements tend to increase together, listing both may repeat much of the same information. We would like a shorter description that still distinguishes the observations reasonably well.

Sources for this history

Pearson (1901), On Lines and Planes of Closest Fit to Systems of Points in Space

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