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Fix loading old logit model, helper for converting old pickle. (#5281)

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* Fix loading old logit model.
* Add a helper script for converting old pickle file.
* Add version as a model parameter.
* Remove the size check in R test to relax the size constraint.
* Add missing R doc for passing linting. Run devtools.
* Cleanup old model IO logic.
* Test compatibility on CI.
* Make the argument as required.
This commit is contained in:
Jiaming Yuan
2020-02-13 15:28:13 +08:00
committed by GitHub
parent 5ca21f252a
commit 213f4fa45a
30 changed files with 403 additions and 137 deletions
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7
doc/tutorials/saving_model.rst
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@@ -91,7 +91,12 @@ Loading pickled file from different version of XGBoost
As noted, pickled model is neither portable nor stable, but in some cases the pickled
models are valuable. One way to restore it in the future is to load it back with that
specific version of Python and XGBoost, export the model by calling `save_model`.
specific version of Python and XGBoost, export the model by calling `save_model`. To help
easing the mitigation, we created a simple script for converting pickled XGBoost 0.90
Scikit-Learn interface object to XGBoost 1.0.0 native model. Please note that the script
suits simple use cases, and it's advised not to use pickle when stability is needed.
It's located in ``xgboost/doc/python`` with the name ``convert_090to100.py``. See
comments in the script for more details.
********************************************************
Saving and Loading the internal parameters configuration