You can ignore the 'unable to recommend' messages as largely informational.
The result is the evaluation score from the evaluator you ran - for example one implementation returns the average absolute difference between expected and predicted preference. Lower is better. On Wed, Jan 4, 2012 at 5:55 PM, Ashish Patel <[email protected]> wrote: > Hi, > > Finally I successfully run the grouplens example on mahout in netbeans. > > but i can not understand the result generated. > > Somewhere it display like unable to recommend in 0 cases; what it means? > > also what is meaning of Evaluation result: 0.7134010054810654? > > help me please... > > My output looks like this: > > 4 Jan, 2012 11:22:59 PM org.slf4j.impl.JCLLoggerAdapter info > INFO: Unable to recommend in 0 cases > 4 Jan, 2012 11:23:02 PM org.slf4j.impl.JCLLoggerAdapter info > INFO: Average time per recommendation: 11ms > 4 Jan, 2012 11:23:02 PM org.slf4j.impl.JCLLoggerAdapter info > INFO: Approximate memory used: 694MB / 1053MB > 4 Jan, 2012 11:23:02 PM org.slf4j.impl.JCLLoggerAdapter info > INFO: Unable to recommend in 47 cases > 4 Jan, 2012 11:23:05 PM org.slf4j.impl.JCLLoggerAdapter info > INFO: Average time per recommendation: 11ms > 4 Jan, 2012 11:23:05 PM org.slf4j.impl.JCLLoggerAdapter info > INFO: Approximate memory used: 638MB / 984MB > 4 Jan, 2012 11:23:05 PM org.slf4j.impl.JCLLoggerAdapter info > INFO: Unable to recommend in 104 cases > 4 Jan, 2012 11:23:06 PM org.slf4j.impl.JCLLoggerAdapter info > INFO: Evaluation result: 0.7134010054810654 > 4 Jan, 2012 11:23:06 PM org.slf4j.impl.JCLLoggerAdapter info > INFO: 0.7134010054810654 > ------------------------------------------------------------------------ > BUILD SUCCESS > ------------------------------------------------------------------------ > Total time: 23.351s > Finished at: Wed Jan 04 23:23:06 IST 2012 > Final Memory: 14M/152M > ------------------------------------------------------------------------ >
