Timeline for Why is it so cool to square numbers (in terms of finding the standard deviation)?
Current License: CC BY-SA 2.5
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 1, 2023 at 22:18 | comment | added | Michael Hardy | @isomorphismes : Far more than just PCA involves rotation in statistics. | |
| Jan 16, 2014 at 4:32 | comment | added | isomorphismes | I guess PCA involves rotation... | |
| Jan 14, 2014 at 16:22 | comment | added | isomorphismes | What does "rotation" mean in statistics? It's clear in physics why we should prize rotation-invariance, but if our three measurements of a person are the length of their surname + their height + their wealth, then I would only compute SD 1-dimensionally. | |
| Oct 18, 2009 at 22:06 | history | answered | Qiaochu Yuan | CC BY-SA 2.5 |