[CONF] Apache Mahout > how do i give the description about input data if each case has variable number of attributes?

[Mark Thomas (Confluence)]

how do i give the description about input data if each case has variable number of attributes? Blog post removed by Mark Thomas hello, i ran randomForest algorithm using the following link successfully. https://cwiki.apache.org/MAHOUT/partial-implementation.html but now my problem is in the following command, $HADOOP_HOME/bin/hadoop jar $MAHOUT_HOME/core/target/mahout-core-<VERSION>-job.jar org.apache.mahout.df.tools.Describe -p testdata/KDDTrain+.arff -f testdata/KDDTrain+.info -d N 3 C 2 N C 4 N C 8 N 2 C 19 N L how do i give the description about input data if each case has variable number of attributes?