How to generate file descriptor in random forest example?

while trying to run random forest example I got the following error -

hadoop jar mahout-core-0.9-job.jar org.apache.mahout.classifier.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 I encounter the following error: WARN tools.Describe: org.apache.commons.cli2.OptionException: Unexpected ?p while processing Options Usage:
[--path --file --descriptor [ ...]
--regression --help]
Options
--path (-p) path Data path
--file (-f) file Path to generated descriptor file
--descriptor (-d) descriptor [descriptor ...] data descriptor
--regression (-r) Regression Problem
--help (-h) Print out help

can anyone help me on this?

Solution

that is typo mistake. its -p in your command.but it look something different(i think you paste it in command prompt)

command like this:

     hadoop jar /usr/lib/mahout/mahout-examples-0.7-cdh4.6.0-job.jar org.apache.mahout.classifier.df.tools.Describe -p /user/root/mahout/rinput.csv -f /user/root/mahout/rinput.info -d I 9 N L

just put - before p