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Aug 27, 2018 at 9:06 comment added mkt (+1) This is interesting - could you tell me what machine learning methods do not require training/testing sets to be from the same population?
Aug 26, 2018 at 6:31 comment added David Dale The good practice is to use the stacked ensemble. First, a linear model makes predictions - it may be not very accurate, but it is good at extrapolation. Then, the GBDT predict residuals of the linear model, which can increse accuracy dramatically without losing sensitivity to trends.
Aug 26, 2018 at 5:51 comment added Hao Yu Thanks!One point I can think is that we can use transfer learning if train and test data have differernt distributions, but the train and test sets differ only in scale, I am not be able to find any transfer learning method that can deal with this case. Do you have any suggestion?Thanks
Aug 26, 2018 at 5:35 history answered Matthew Drury CC BY-SA 4.0