Comments (7)
guoguibing
commented on May 19, 2024
Try to git the latest source codes from GitHub
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guoguibing
commented on May 19, 2024
And make sure that you have properly configered a ".conf" file before your run an algorithm.
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guoguibing
commented on May 19, 2024
The default configuration file is "librec.conf"
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8-chems
commented on May 19, 2024
I am facing the same problem, the example userKNN doesn't work with the default librec conf file.
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FotisSp
commented on May 19, 2024
I am facing the same problem! userKNN doesn't work with the default librec conf file and i also used my own conf file but i received Null Pointer Exception
rec.similarity.class=pcc
rec.neighbors.knn.number=50
rec.recommender.class=userknn
rec.recommender.similarities=user
rec.recommender.isranking=false
rec.recommender.ranking.topn=10
rec.filter.class=generic
rec.similarity.shrinkage=10
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allenjack
commented on May 19, 2024
Hi,
Could you provide the full stack trace information?
…On 18 December 2017 at 19:06, FotisSp ***@***.***> wrote:
I am facing the same problem! userKNN doesn't work with the default librec
conf file and i also used my own conf file but i received Null Pointer
Exception
rec.similarity.class=pcc
rec.neighbors.knn.number=50
rec.recommender.class=userknn
rec.recommender.similarities=user
rec.recommender.isranking=false
rec.recommender.ranking.topn=10
rec.filter.class=generic
rec.similarity.shrinkage=10
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FotisSp
commented on May 19, 2024
yes the stack trace is :
Exception in thread "main" java.lang.NullPointerException at net.librec.recommender.cf.UserKNNRecommender.setup(UserKNNRecommender.java:52) at net.librec.recommender.AbstractRecommender.recommend(AbstractRecommender.java:216) at Thesis.Recomendation.Recommendation.main(Recommendation.java:56)
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