TwentyNewsgroups (MAHOUT) edited by Grant Ingersoll
Page: http://cwiki.apache.org/confluence/display/MAHOUT/TwentyNewsgroups
Changes:
http://cwiki.apache.org/confluence/pages/diffpagesbyversion.action?pageId=99739&originalVersion=1&revisedVersion=2
Content:
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h1. Twenty Newsgroups Classification
[Get
Mahout|http://cwiki.apache.org/confluence/display/MAHOUT/index#index-Installation%2FSetup]
Assume MAHOUT_HOME refers to the location where you checked out/installed Mahout
After downloading the distribution, unzip/untar it into the directory of your
choice and do:
Training:
# cd examples
# ant get-files
# ant job
Then, from Hadoop:
Test Classifier:
# emacs conf/hadoop-site.xml (add in local settings per
[quickstart|http://hadoop.apache.org/core/docs/current/quickstart.html])
# bin/hadoop namenode -format //Format the HDFS
# bin/start-all.sh //Start Hadoop
# bin/hadoop dfs -put <MAHOUT_HOME>/work/20news-18828-collapse
20newsInput //Copies the extracted text to HDFS
# bin/hadoop jar <MAHOUT_HOME>/build/apache-mahout-0.1-dev-examples.jar
org.apache.mahout.examples.classifiers.cbayes.TwentyNewsgroups -t -i
20newsInput -o 20newsOutput
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