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From Sebastian Schelter <...@apache.org>
Subject Re: output of Recommender
Date Sun, 27 Nov 2011 15:28:25 GMT
The evaluation randomly splits the dataset into training and test set.
You see different results for different splits.

--sebastian

On 27.11.2011 15:30, bish maten wrote:
> the Evaluation Result is changing each time it is run with mvn exec command.
> Why is the result changing each time it run? Evaluation result varies from
> 1.0,  0.66,  1.2, ...
> 
> 
> INFO: Unable to recommend in 2 cases
> Nov 27, 2011 6:22:43 AM org.slf4j.impl.JCLLoggerAdapter info
> INFO: Evaluation result: 1.0
> Nov 27, 2011 6:22:43 AM org.slf4j.impl.JCLLoggerAdapter info
> INFO: 1.0
> 
> another run gives following
> 
> INFO: Unable to recommend in 8 cases
> Nov 27, 2011 6:25:08 AM org.slf4j.impl.JCLLoggerAdapter info
> INFO: Evaluation result: 0.6666666666666666
> Nov 27, 2011 6:25:08 AM org.slf4j.impl.JCLLoggerAdapter info
> INFO: 0.6666666666666666
> 
> 
> 
>> the output from GroupLensRecommenderEvaluatorRunner gives following output
>> (given a input rating file)
>>
>> Evaluation Result  1.09
>> and Unable to recommend in two cases
>>
> 


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