How do I run examples listed at
https://cwiki.apache.org/MAHOUT/recommendationexamples.html
I downloaded the file for grouplens dataset and after running the command, I
get back an error -
[code]
mvn -e exec:java
-Dexec.mainClass="org.apache.mahout.cf.taste.example.grouplens.GroupLensRecommenderEvaluatorRunner"
-Dexec.args="-i
~/software/hadoop/mahout/mahout-0.3/examples/input/ml-data/u.data"
.................
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of
range: -1
at java.lang.String.substring(String.java:1937)
at
org.apache.mahout.cf.taste.example.grouplens.GroupLensDataModel.convertGLFile(GroupLensDataModel.java:61)
at
org.apache.mahout.cf.taste.example.grouplens.GroupLensDataModel.<init>(GroupLensDataModel.java:48)
at
org.apache.mahout.cf.taste.example.grouplens.GroupLensRecommenderEvaluatorRunner.main(GroupLensRecommenderEvaluatorRunner.java:49)
[/code]
-Mac
