Comments (2)
Apache Spark ML decision tree models do not support such "execution flow" customizations. Therefore, it is impossible to generate the requested PMML markup automatically.
Possible workaround:
- Generate a "raw" PMML class model object by invoking
ConverterUtil#toPMML(StructType, PipelineModel)
. - Apply a (list of-) post-processing Visitor(s) to it.
- Save the "post-processed" PMML class model object to a file.
In your case, the Visitor needs to be modifying TreeModel
elements (of the top-level MiningModel
element). Here's a starting point:
PMML pmml = ConverterUtil.toPMML(...);
Visitor treeModelUpdater = new new AbstractVisitor(){
@Override
public VisitorAction visit(TreeModel treeModel){
treeModel.setMissingValueStrategy(MissingValueStrategy.NULL_PREDICTION);
treeModel.setMissingValuePenalty(0d);
treeModel.setNoTrueChildStrategy(NoTrueChildStrategy.RETURN_NULL_PREDICTION);
return VisitorAction.CONTINUE;
}
};
treeModelUpdater.applyTo(pmml);
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Related to #14
It should be possible to toggle PMML converters between two modes:
- "Missing value"-friendly (a missing input leads to a missing prediction).
- "Missing value"-hostile (a missing input raises an error, or leads to a non-missing default prediction).
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Related Issues (20)
- MultilayerPerceptronClassificationModel IllegalArgumentException("Expected 3 target categories, got 2 target categories"); HOT 1
- How to import the training data schema in libsvm format HOT 6
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- StringIndexerModelConverter gives java.lang.IllegalArgumentException HOT 4
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- Support for custom Java-backed models (eg. factorization machine) HOT 1
- Why One-Hot-Encoding is not visible in PMML? HOT 1
- py4j.protocol.Py4JError: org.jpmml.sparkml.PMMLBuilder does not exist in the JVM HOT 1
- Error with LightGBMClassificationModel HOT 5
- Support for `XGBoostRegressor.missing` property HOT 6
- Troubleshooting XGBoost model performance HOT 17
- Support for Apache Spark 3.3.X HOT 2
- 2.x jars missing from Maven Central HOT 3
- Support for `replace` SQL function HOT 6
- Exception in thread "main" java.lang.NoClassDefFoundError: com/microsoft/azure/synapse/ml/codegen/Wrappable
- java.lang.NoSuchMethodError: org.jpmml.sparkml.SparkMLEncoder.getDataField HOT 1
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