Hello,
I'm having an" Item Attribute k-NN " workflow that is similar with the
http://www.myexperiment.org/workflows/2684.html workflow. I tried it with the sample data from the myexperiment workflow and it worked. However, with my data I get an NegativeArraySizeException error.
I do not understand, the user id and the item id are of the same type as in the example..what could it be wrong with the data?
Exception: java.lang.NegativeArraySizeException
Message: null
Stack trace:
com.rapidminer.data.Matrix_f.<init>(Matrix_f.java:69)
com.rapidminer.data.CorrelationMatrix.<init>(CorrelationMatrix.java:52)
com.rapidminer.data.BinaryDataCorrelationMatrix.<init>(BinaryDataCorrelationMatrix.java:17)
com.rapidminer.data.BinaryCosine.<init>(BinaryCosine.java:24)
com.rapidminer.data.BinaryCosine.Create(BinaryCosine.java:104)
com.rapidminer.ItemRecommendation.ItemAttributeKnn.Train(ItemAttributeKnn.java:50)
com.rapidminer.ItemRecommendation.ItemAttributeKnnO.doWork(ItemAttributeKnnO.java:162)
com.rapidminer.operator.Operator.execute(Operator.java:867)
com.rapidminer.operator.execution.SimpleUnitExecutor.execute(SimpleUnitExecutor.java:51)
com.rapidminer.operator.ExecutionUnit.execute(ExecutionUnit.java:711)
com.rapidminer.operator.OperatorChain.doWork(OperatorChain.java:375)
com.rapidminer.operator.Operator.execute(Operator.java:867)
com.rapidminer.Process.run(Process.java:949)
com.rapidminer.Process.run(Process.java:873)
com.rapidminer.Process.run(Process.java:832)
com.rapidminer.Process.run(Process.java:827)
com.rapidminer.Process.run(Process.java:817)
com.rapidminer.gui.ProcessThread.run(ProcessThread.java:63)
Thank you!
Alina
