Timeline for PCA on correlation or covariance: does PCA on correlation ever make sense?
Current License: CC BY-SA 3.0
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| Jun 28, 2013 at 23:26 | comment | added | ttnphns | The practical approach you seem to advocate here boils down to - when both covariances and correlations are warranted - "try both and see what works best". That pure empirical stance masks the fact that any choice goes with its own assumptions or paradigm about the reality which the researcher ought to be aware of in advance, even if he understands that he prefers one of them fully arbitrarily. Selecting "what works best" is the capitalizing on the feeling of pleasure, the narcomania. | |
| Jun 28, 2013 at 21:48 | history | edited | Nick Cox | CC BY-SA 3.0 |
small changes to expression, spelling, punctuation
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| Jun 28, 2013 at 21:37 | history | answered | mark | CC BY-SA 3.0 |