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rpart fails to predict on titanic task #97
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Titanic needs preprocessing, better don't use it for automatic tests. |
You could create a preprocessed version and add it to the package, though. |
rpart breaks, there is nothing I can do about it. You need to merge levels or use stratification. |
bah, i hate this issue. does anyone know what they are doing in other toolboxes? is it possible to have a "fallback"? that would only work if the fallback is only on the observations where we break, which would imply testing them all one-by-one. which is totally infeasible as too expensive? |
well. we DO know which levels a learner has seen during training? so we DO know on which observations it WILL break? even without calling it? |
in any case, this does not seem like an mlr3 issue, and if somebody does not post otherwise, i dont see a simple solution here. i will try to think about this further in pipelines |
i tried to outline a solution in the issue here: |
throws:
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