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ML.NET 1.5.0-preview2

docs/release-notes/1.5.0-preview2/release-1.5.0-preview2.md

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ML.NET 1.5.0-preview2

New Features (IN-PREVIEW, please provide feedback)

  • TimeSeriesImputer (#4623) This data transformer can be used to impute missing rows in time series data.
  • LDSVM Trainer (#4060) The "Local Deep SVM" usess trees as its SVM kernel to create a non-linear binary trainer. A sample can be found here.
  • Onnxruntime updated to v1.2 This also includes support for GPU execution of onnx models
  • Export-to-ONNX for below components:
    • SlotsDroppingTransformer (#4562)
    • ColumnSelectingTransformer (#4590)
    • VectorWhiteningTransformer (#4577)
    • NaiveBayesMulticlassTrainer (#4636)
    • PlattCalibratorTransformer (#4699)
    • TokenizingByCharactersTransformer (#4805)
    • TextNormalizingTransformer (#4781)

Bug Fixes

  • Fix issue in WaiterWaiter caused by race condition (#4829)
    • Onnx Export change to allow for running inference on multiple rows in OnnxRuntime (#4783)
  • Data splits to default to MLContext seed when not specified (#4764)
  • Add Seed property to MLContext and use as default for data splits (#4775)
  • Onnx bug fixes
    • Updating onnxruntime version (#4882)
    • Calculate ReduceSum row by row in ONNX model from OneVsAllTrainer (#4904)
    • Several onnx export fixes related to KeyToValue and ValueToKey transformers (#4900, #4866, #4841, #4889, #4878, #4797)
    • Fixes to onnx export for text related transforms (#4891, #4813)
    • Fixed bugs in OptionalColumnTransform and ColumnSelecting (#4887, #4815)
    • Alternate solution for ColumnConcatenatingTransformer (#4875)
    • Added slot names support for OnnxTransformer (#4857)
    • Fixed output schema of OnnxTransformer (#4849)
    • Changed Binarizer node to be cast to the type of the predicted label … (#4818)
    • Fix for OneVersusAllTrainer (#4698)
    • Enable OnnxTransformer to accept KeyDataViewTypes as if they were UInt32 (#4824)
    • Fix off by 1 error with the cats_int64s attribute for the OneHotEncoder ONNX operator (#4827)
    • Changed Binarizer node to be cast to the type of the predicted label … (#4818)
    • Updated handling of missing values with LightGBM, and added ability to use (0) as missing value (#4695)
    • Double cast to float for some onnx estimators (#4745)
    • Fix onnx output name for GcnTransform (#4786)
  • Added support to run PFI on uncalibrated binary classification models (#4587)
  • Fix bug in WordBagEstimator when training on empty data (#4696)
  • Added Cancellation mechanism to Image Classification (through the experimental nuget) (fixes #4632) (#4650)
  • Changed F1 score to return 0 instead of NaN when Precision + Recall is 0 (#4674)
  • TextLoader, BinaryLoader and SvmLightLoader now check the existence of the input file before training (#4665)
  • ImageLoadingTransformer now checks the existence of input folder before training (#4691)
  • Use random file name for AutoML experiment folder (#4657)
  • Using invariance culture when converting to string (#4635)
  • Fix NullReferenceException when it comes to Recommendation in AutoML and CodeGenerator (#4774)

Enhancements

  • Added in support for System.DateTime type for the DateTimeTransformer (#4661)
  • Additional changes to ExpressionTransformer (#4614)
  • Optimize generic MethodInfo for Func<TResult> (#4588)
  • Data splits to default to MLContext seed when not specified (#4764)
  • Added in DateTime type support for TimeSeriesImputer (#4812)

Test updates

  • Code analysis updates
    • Update analyzer test library (#4740)
    • Enable the internal code analyzer for test projects (#4731)
    • Implement MSML_ExtendBaseTestClass (Test classes should be derived from BaseTestClass) (#4746)
    • Enable MSML_TypeParamName for the full solution (#4762)
    • Enable MSML_ParameterLocalVarName for the full solution (#4833)
    • Enable MSML_SingleVariableDeclaration for the full solution (#4765)
  • Better logging from tests
    • Ensure tests capture the full log (#4710)
    • Fix failure to capture test failures (#4716)
    • Collect crash dump upload dump and pdb to artifact (#4666)
  • Enable Conditional Numerical Reproducibility for tests (#4569)
  • Changed all MLContext creation to include a fixed seed (#4736)
  • Fix incorrect SynchronizationContext use in TestSweeper (#4779)

Documentation Updates

Breaking Changes

  • None