Timeline for PCA on train and test datasets: do I need to merge them?
Current License: CC BY-SA 3.0
3 events
| when toggle format | what | by | license | comment | |
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| Oct 26, 2016 at 13:03 | comment | added | gokul_uf | @Robert Let's say your dataset has 500 dimensions, you run PCA on the training set to reduce to 50D, run a classifier on that and get good results. Now how do you use this classifier on the test data? Do you reduce the test data dimensions to 50 via another PCA and use the classifier? | |
| Sep 7, 2014 at 0:49 | vote | accept | user3037153 | ||
| Sep 7, 2014 at 0:49 | |||||
| Sep 6, 2014 at 22:12 | history | answered | Robert Kubrick | CC BY-SA 3.0 |