I am new in GATE and I am using it to conduct the machine learning. The configure file for Batching Learning PR is the following:
<?xml version="1.0"?>
-<ML-CONFIG>
<VERBOSITY level="1"/>
<SURROUND value="false"/>
<PARAMETER value="0.5" name="thresholdProbabilityClassification"/>
<multiClassification2Binary method="one-vs-others"/>
<EVALUATION method="kfold" ratio="0.66" runs="5"/>
<ENGINE options=" -p 50 -n 5 -optB 0.0 " implementationName="PAUM" nickname="PAUM"/>
-<DATASET>
<INSTANCE-TYPE>attitude</INSTANCE-TYPE>
-<NGRAM>
<NAME>ngram</NAME>
<NUMBER>1</NUMBER>
<CONSNUM>1</CONSNUM>
-<CONS-1>
<TYPE>Token</TYPE>
<FEATURE>root</FEATURE>
</CONS-1>
<!-- <CONS-2> <TYPE>Token</TYPE> <FEATURE>orth</FEATURE> </CONS-2> -->
</NGRAM>
-<ATTRIBUTE>
<NAME>Class</NAME>
<SEMTYPE>NOMINAL</SEMTYPE>
<TYPE>attitude</TYPE>
<FEATURE>feature</FEATURE>
<POSITION>0</POSITION>
<CLASS/>
</ATTRIBUTE>
</DATASET>
</ML-CONFIG>The annotation I want the program to learn is called 'attitude', with feature called 'feature'. The value of the feature is just positive and negative.
However, every time I run the Batch Learning PR(Trainning mode), there will be an error like this:
java.lang.NullPointerException
at gate.learning.NLPFeaturesOfDoc.writeNLPFeaturesToFile(NLPFeaturesOfDoc.java:818)
at gate.learning.LightWeightLearningApi.annotations2NLPFeatures(LightWeightLearningApi.java:198)
at gate.learning.LearningAPIMain.execute(LearningAPIMain.java:594)
at gate.util.Benchmark.executeWithBenchmarking(Benchmark.java:291)
at gate.creole.SerialController.runComponent(SerialController.java:225)
at gate.creole.SerialController.executeImpl(SerialController.java:157)
at gate.creole.SerialAnalyserController.executeImpl(SerialAnalyserController.java:223)
at gate.creole.SerialAnalyserController.execute(SerialAnalyserController.java:126)
at gate.util.Benchmark.executeWithBenchmarking(Benchmark.java:291)
at gate.gui.SerialControllerEditor$RunAction$1.run(SerialControllerEditor.java:1728)
at java.lang.Thread.run(Unknown Source)
Since I can't debug during the midway within GATE, I don't understand what's wrong with the code.
Could anyone help?
Thanks!
