RE: Mahout K-Means - Quality of the clusters

2014-05-20 Thread hiroshi leon
Thanks Pat and David, I tried what you told me to do, but unfortunately is not working... I get the following error when running the command: ./mahout clusterdump -i /user/Data-output/clusters-1-final -o analyze.txt --evaluate true ERROR common.AbstractJob: Unexpected true while processing

Recommender Systems - RecommenderIRStatsEvaluator

2014-05-20 Thread Floris Devriendt
Hey all, The *RecommenderEvaluator *has the option to choose how big your training set is (and so choosing the test set size as well), but the *RecommenderIRStatsEvaluator* does not seem to have this argument in its *.evaluate()*-method. That's why I was wondering how the internals of the

Re: Recommender Systems - RecommenderIRStatsEvaluator

2014-05-20 Thread Tevfik Aytekin
- Is there a way to specify the train and test set like you can with the *RecommenderEvaluator*? No, though you can specify the evaluation percentage. This is because of the logic of evaluation. The logic is to take away relevant items and then make recommendations and see whether the

How to print data after canopy clustering

2014-05-20 Thread Aleksander Sadecki
Hi Experts, Here you can find simple piece of code which I wrote: // import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException; import org.apache.hadoop.conf.Configuration; import

Re: Mahout K-Means - Quality of the clusters

2014-05-20 Thread Pat Ferrel
I looked at the code and the -e shouldn’t need a value. The null pointer is because of the other params. Unfortunately the help doesn’t say which params are required. Looks like when it runs evaluation it needs the clustered points and the distance measure should be the same as you used to

SVD mahout implementation

2014-05-20 Thread Celal SAVUR
Hello Everyone, I am recently working on a project, and I need to implement SVD recmommender system. I am looking for a simple example to see how can I do in mahout. If you can share with me an simple example, it will me perfect. Thank you in advance. Celal

Parsing mahout output

2014-05-20 Thread jamal sasha
Hi, I want to convert the output of cf module (als,svd) etc to csv. How do I do the conversion? I want to look at those latent features? Thanks Jamal

Re: SVD mahout implementation

2014-05-20 Thread Peng Zhang
Hi Celal, Refer to page 26 of the following document, which gives you some code snippet on Mahout’s SVD. http://ir.cs.georgetown.edu/cs422/files/DM-ItemRecommenders.pdf Best Regards, Peng Zhang On May 21, 2014, at 3:44 AM, Celal SAVUR c.sa...@gmail.com wrote: Hello Everyone, I am

Re: Parsing mahout output

2014-05-20 Thread Peng Zhang
Hi Jamal, Maybe you can use getUserFeature() and getItemFeature() methods in Factorization class to look at the latent features. Best Regards, Peng Zhang On May 21, 2014, at 5:42 AM, jamal sasha jamalsha...@gmail.com wrote: Hi, I want to convert the output of cf module (als,svd) etc to