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Author Topic: trouble using user K-NN(recommender system)  (Read 243 times)
agb46
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Posts: 3


« on: February 26, 2014, 08:18:28 PM »

Hi everybody!!

I'm new using RapidMiner, I keep on this video http://www.screencast.com/users/DataMiningINCAE/folders/Tutoriales%20Adicionales%20de%20Rapid%20Miner/media/a23acb02-4bc1-4821-9b4b-30d8e27476d4 with this data http://www.informatik.uni-freiburg.de/~cziegler/BX/BX-CSV-Dump.zip (Book Ratings) and I have an error, in User K-NN I search here for similarity problems but I don't find anything which help me.

This is my log.

EVERE: Process failed: operator cannot be executed (14192127). Check the log messages...
java.lang.ArrayIndexOutOfBoundsException: 14192127
   at com.rapidminer.data.CorrelationMatrix.setLocation(CorrelationMatrix.java:43)
   at com.rapidminer.correlation.Pearson.ComputeCorrelations(Pearson.java:187)
   at com.rapidminer.correlation.Pearson.Create(Pearson.java:54)
   at com.rapidminer.operator.RatingPrediction.UserKnnPearson.Train(UserKnnPearson.java:37)
   at com.rapidminer.operator.RatingPrediction.UserKnn.doWork(UserKnn.java:159)
   at com.rapidminer.operator.Operator.execute(Operator.java:879)
   at com.rapidminer.operator.execution.SimpleUnitExecutor.execute(SimpleUnitExecutor.java:35)
   at com.rapidminer.operator.ExecutionUnit.execute(ExecutionUnit.java:759)
   at com.rapidminer.operator.OperatorChain.doWork(OperatorChain.java:376)
   at com.rapidminer.operator.Operator.execute(Operator.java:879)
   at com.rapidminer.Process.run(Process.java:1008)
   at com.rapidminer.Process.run(Process.java:909)
   at com.rapidminer.Process.run(Process.java:862)
   at com.rapidminer.Process.run(Process.java:857)
   at com.rapidminer.Process.run(Process.java:847)
   at com.rapidminer.gui.ProcessThread.run(ProcessThread.java:51)

Feb 26, 2014 8:03:40 PM com.rapidminer.gui.ProcessThread run
SEVERE: Here:           Process[1] (Process)
           subprocess 'Main Process'
             +- Retrieve LibrosRatings[1] (Retrieve)
             +- Set Role[1] (Set Role)
             +- Split Data[1] (Split Data)
       ==>   +- User k-NN[1] (User k-NN)
             +- Apply Model[0] (Apply Model (Rating Prediction))
Feb 26, 2014 8:03:40 PM com.rapidminer.gui.ProcessThread run
SEVERE: java.lang.ArrayIndexOutOfBoundsException: 14192127
java.lang.ArrayIndexOutOfBoundsException: 14192127
   at com.rapidminer.data.CorrelationMatrix.setLocation(CorrelationMatrix.java:43)
   at com.rapidminer.correlation.Pearson.ComputeCorrelations(Pearson.java:187)
   at com.rapidminer.correlation.Pearson.Create(Pearson.java:54)
   at com.rapidminer.operator.RatingPrediction.UserKnnPearson.Train(UserKnnPearson.java:37)
   at com.rapidminer.operator.RatingPrediction.UserKnn.doWork(UserKnn.java:159)
   at com.rapidminer.operator.Operator.execute(Operator.java:879)
   at com.rapidminer.operator.execution.SimpleUnitExecutor.execute(SimpleUnitExecutor.java:35)
   at com.rapidminer.operator.ExecutionUnit.execute(ExecutionUnit.java:759)
   at com.rapidminer.operator.OperatorChain.doWork(OperatorChain.java:376)
   at com.rapidminer.operator.Operator.execute(Operator.java:879)
   at com.rapidminer.Process.run(Process.java:1008)
   at com.rapidminer.Process.run(Process.java:909)
   at com.rapidminer.Process.run(Process.java:862)
   at com.rapidminer.Process.run(Process.java:857)
   at com.rapidminer.Process.run(Process.java:847)
   at com.rapidminer.gui.ProcessThread.run(ProcessThread.java:51)


  Sorry If my English isn't good. Thanks in advance!!
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Marius
Administrator
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Posts: 1794



WWW
« Reply #1 on: February 28, 2014, 02:22:13 PM »

Hi,

User k-NN is from an extension that is not maintained by RapidMiner, right? In that case please contact the maintainer of the extension. Please correct me if I am wrong.

Best regards,
Marius
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