i follow this example to guess missing value in matrix https://mahout.apache.org/users/recommender/intro-als-hadoop.html
mahout/bin/mahout parallelALS --input /home/martin/Downloads/rdata.txt --output /home/martin/Downloads/output.txt --lambda 0.1 --implicitFeedback true --alpha 0.8 --numFeatures 2 --numIterations 5 --numThreadsPerSolver 1 --tempDir tmp mahout/bin/mahout recommendfactorized --input /home/martin/Downloads/rdata.txt --userFeatures /home/martin/Downloads/U/ --itemFeatures /home/martin/Downloads/M/ --numRecommendations 1 --output recommendations --maxRating 1 vi rdata.txt 1,1,5 1,2,4 1,3,5 2,1,4 2,2,5 2,3,4 3,1,5 3,2,4 4,1,1 4,2,2 5,1,2 5,2,1 5,3,1
