Examples of org.apache.mahout.cf.taste.hadoop.als.PredictionJob$PairsMapper

org.apache.mahout.cf.taste.hadoop.als.PredictionJob

Compute predictions for user,item pairs using an existing matrix factorization

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
--userFeatures (path): path to the user feature matrix
--itemFeatures (path): path to the item feature matrix


    Path tempDir = new Path(parsedArgs.get("--tempDir"));
    Path predictions = new Path(tempDir, "predictions");
    Path errors = new Path(tempDir, "errors");


    ToolRunner.run(getConf(), new PredictionJob(), new String[] { "--output", predictions.toString(),
        "--pairs", parsedArgs.get("--pairs"), "--userFeatures", parsedArgs.get("--userFeatures"),
        "--itemFeatures", parsedArgs.get("--itemFeatures"),
        "--tempDir", tempDir.toString() });


    Job estimationErrors = prepareJob(new Path(parsedArgs.get("--pairs") + ',' + predictions), errors,

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Examples of org.apache.mahout.cf.taste.hadoop.als.PredictionJob$PairsMapper

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