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Dec 12, 2018 at 15:58 comment added LudvigH In the Coursera machine learning class by Andrew Ng/Stanford, this is called "Skewed Classes", so I guess that notion will spread. A bit unfortunate, since I think Skewness is a better term for ordinal data rather than categorical data.
Sep 5, 2017 at 9:23 comment added Dikran Marsupial the same thing can be done in logistic regression as well (as LR is often fitted using iteratively re-weighted least-squares giving different weights to different patterns ought to be fairly straighforward)
Sep 5, 2017 at 9:03 history answered ksha CC BY-SA 3.0