Jiaming Yuan 546de5efd2
[pyspark] Cleanup data processing. (#8088)
- Use numpy stack for handling list of arrays.
- Reuse concat function from dask.
- Prepare for `QuantileDMatrix`.
- Remove unused code.
- Use iterator for prediction to avoid initializing xgboost model
2022-07-26 15:00:52 +08:00
..
2022-07-13 13:11:18 +08:00