Nevermind. I ran the RowIdJob class hard-coding the paths and it worked. El 15 de abril de 2011 19:54, Julián Limón Núñez <[email protected]>escribió:
> Hello all, > > I hope you guys can shed some light here. I've been trying to use the > command line to convert a seq2sparse-generated vector into a matrix form > that is a SequenceFile<IntWritable,VectorWritable> and a > SequenceFile<IntWritable,Text> as suggested in > https://cwiki.apache.org/MAHOUT/dimensional-reduction.html and > > http://search.lucidimagination.com/search/document/748181681ae5238b/need_a_little_help_with_using_svd#994da1aa86154c12 > > However, I'm getting the following error: > > bin/mahout rowid --input > /home/julian/Documents/code/bb/test6/vectors/tfidf-vectors/part-r-00000 > --output /home/julian/Documents/code/bb/test6/matrix/ > no HADOOP_HOME set, running locally > Exception in thread "main" java.lang.IllegalArgumentException: Can not > create a Path from a null string > at org.apache.hadoop.fs.Path.checkPathArg(Path.java:78) > at org.apache.hadoop.fs.Path.<init>(Path.java:90) > at org.apache.mahout.utils.vectors.RowIdJob.run(RowIdJob.java:41) > at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) > at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79) > at org.apache.mahout.utils.vectors.RowIdJob.main(RowIdJob.java:79) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at > org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68) > at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139) > at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:184) > > I've already tried to change "input" and "output" for "mapred.input.dir" > and "mapred.output.dir" to no avail. Any hints on what may be causing the > error? Alternatively, a pointer to the classes I could use to achieve the > same result would also help. > > Thanks a lot, > > Julian > >
