Fixed bug where boost_tree() models couldn't be fit with 1 predictor if validation argument was used.
#994
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topepo
approved these changes
Jul 28, 2023
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What the title says. This bug was reported on StackOverflow here https://stackoverflow.com/questions/76782839/error-fitting-xgboost-classification-models-with-single-predictor
The fix was to add drop = FALSE to matrix subsetting in as_xgb_data()