Cannot map index of nominal attribute to nominal value

Mo1

Cannot map index of nominal attribute to nominal value

Hi, 

while preprocessing a Textmining operation i got the following problem : 

 

 

 

The Subprocesses are : 

 

How can i fix this? 

MartinLiebig

Hi,

 

let me explain what happend.

In RM we map Nominal values to Integers. So if you store nominals we have a nominal mapping store like:

i -> 0

love ->1

RapidMiner ->2

 

In your case an operator wants to get the Nominalstring for the mapped value 3. This is not exsisting. To be honest i never experienced this error so far. Can you maybe tell me which operator is throwing the error?

 

~Martin

Mo1

Hey Martin, 

 

thank you so much for your answer. 
To be honest i am not sure which operator throws the error. The only operator which throws an alert sign is Generate ID (2).  Could this be possible? Or how can I figure out which operator needs to be fixed? 

Again, thank you so much for helping a desperate student. 

WBR 

Maurice

MartinLiebig

Hi Mo1,

 

if you click on details we can see the stack trace which tells us a lot about whats happening. Could you post this one?

 

~Martin

Mo1

Hi Martin, 

 

of course : 

• Exception: com.rapidminer.example.AttributeTypeException
• Message: Cannot map index of nominal attribute to nominal value: index 0 is out of bounds!
• Stack trace:
• com.rapidminer.example.table.PolynominalMapping.mapIndex(PolynominalMapping.java:140)
• com.rapidminer.operator.text.io.ExampleSet2Documents.doWork(ExampleSet2Documents.java:106)
• com.rapidminer.operator.Operator.execute(Operator.java:1002)
• com.rapidminer.operator.execution.SimpleUnitExecutor.execute(SimpleUnitExecutor.java:76)
• com.rapidminer.operator.ExecutionUnit$3.run(ExecutionUnit.java:811)
• com.rapidminer.operator.ExecutionUnit$3.run(ExecutionUnit.java:806)
• java.security.AccessController.doPrivileged(Native Method)
• com.rapidminer.operator.ExecutionUnit.execute(ExecutionUnit.java:806)
• com.rapidminer.operator.OperatorChain.doWork(OperatorChain.java:392)
• com.rapidminer.operator.SimpleOperatorChain.doWork(SimpleOperatorChain.java:99)
• com.rapidminer.operator.Operator.execute(Operator.java:1002)
• com.rapidminer.operator.execution.SimpleUnitExecutor.execute(SimpleUnitExecutor.java:76)
• com.rapidminer.operator.ExecutionUnit$3.run(ExecutionUnit.java:811)
• com.rapidminer.operator.ExecutionUnit$3.run(ExecutionUnit.java:806)
• java.security.AccessController.doPrivileged(Native Method)
• com.rapidminer.operator.ExecutionUnit.execute(ExecutionUnit.java:806)
• com.rapidminer.operator.OperatorChain.doWork(OperatorChain.java:392)
• com.rapidminer.operator.Operator.execute(Operator.java:1002)
• com.rapidminer.Process.run(Process.java:1195)
• com.rapidminer.Process.run(Process.java:1091)
• com.rapidminer.Process.run(Process.java:1044)
• com.rapidminer.Process.run(Process.java:1039)
• com.rapidminer.Process.run(Process.java:1029)
• com.rapidminer.gui.ProcessThread.run(ProcessThread.java:65)

Mo1

Hi Martin, 

is there anything you can figure out from the trace?

 

WBR Maurice

Mo1

Hi Martin, 

 

is there anything new you could find out?

 

WBR 

 

Mo

sgenzer

Hello @Mo1 - if you're trying to get someone's attention on the forum, please use the @ handle with the username in your post.  It will be more likely to attract that person's attention - particularly someone as busy as @mschmitz 

 

Scott