org.apache.mahout.utils.eval
Class InMemoryFactorizationEvaluator
java.lang.Object
org.apache.hadoop.conf.Configured
org.apache.mahout.common.AbstractJob
org.apache.mahout.utils.eval.InMemoryFactorizationEvaluator
- All Implemented Interfaces:
- org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool
public class InMemoryFactorizationEvaluator
- extends AbstractJob
Measures the root-mean-squared error of a ratring matrix factorization against a test set.
the factorization matrices are read into memory, which makes this job pretty fast, if you get OutOfMemoryErrors,
use ParallelFactorizationEvaluator
instead
Command line arguments specific to this class are:
- --output (path): path where output should go
- --pairs (path): path containing the test ratings, each line must be userID,itemID,rating
- --userFeatures (path): path to the user feature matrix
- --itemFeatures (path): path to the item feature matrix
Methods inherited from class org.apache.mahout.common.AbstractJob |
addFlag, addInputOption, addOption, addOption, addOption, addOption, addOutputOption, buildOption, getInputPath, getOption, getOutputPath, hasOption, keyFor, maybePut, parseArguments, parseDirectories, prepareJob, shouldRunNextPhase |
Methods inherited from class org.apache.hadoop.conf.Configured |
getConf, setConf |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface org.apache.hadoop.conf.Configurable |
getConf, setConf |
InMemoryFactorizationEvaluator
public InMemoryFactorizationEvaluator()
main
public static void main(String[] args)
throws Exception
- Throws:
Exception
run
public int run(String[] args)
throws Exception
- Throws:
Exception
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