It doesn't look like -us has been removed. At least i see it on the head of
the trunk, SSVDCli.java, line 62:
addOption("uSigma", "us", "Compute U * Sigma", String.valueOf(false));
i.e. short version(single dash) -us true, or long version(double-dash)
--uSigma true. Can you check again with 0.9? thanks.
On Tue, Mar 4, 2014 at 9:37 AM, Dmitriy Lyubimov <dlie...@gmail.com> wrote:
> Kevin, thanks for reporting this.
>
> Stack overflow error has not been known to happen to date. But i will take
> a look. It looks like a bug in the mean computation code, given your stack
> trace, although it may have been induced by some circumstances specific to
> your deployment.
>
> What version is it? 0.9?
>
> As for -us, it is not known to have been removed to me. If it were, it
> happened without my knowledge. I will take a look at the trunk.
>
> -d
>
>
> On Tue, Mar 4, 2014 at 5:53 AM, Kevin Moulart <kevinmoul...@gmail.com>wrote:
>
>> Hi,
>>
>> I'm trying to apply a PCA to reduce the dimension of a matrix of 1603
>> columns and 100.000 to 30.000.000 lines using ssvd with the pca option,
>> and
>> I always get a StackOverflowError :
>>
>> Here is my command line :
>> mahout ssvd -i /user/myUser/Echant100k -o /user/myUser/Echant/SVD100 -k
>> 100
>> -pca "true" -U "false" -V "false" -t 3 -ow
>>
>> I also tried to put "-us true" as mentionned in
>>
>> https://cwiki.apache.org/confluence/download/attachments/27832158/SSVD-CLI.pdf?version=18&modificationDate=1381347063000&api=v2but
>> the option is not available anymore.
>>
>> The output of the previous command is :
>> MAHOUT_LOCAL is not set; adding HADOOP_CONF_DIR to classpath.
>> Running on hadoop, using /opt/cloudera/parcels/CDH/lib/hadoop/bin/hadoop
>> and HADOOP_CONF_DIR=/etc/hadoop/conf
>> MAHOUT-JOB: /usr/lib/mahout/mahout-examples-0.7-cdh4.5.0-job.jar
>> 14/03/04 14:45:16 INFO common.AbstractJob: Command line arguments:
>> {--abtBlockHeight=[200000], --blockHeight=[10000], --broadcast=[true],
>> --computeU=[false], --computeV=[false], --endPhase=[2147483647],
>> --input=[/user/myUser/Echant100k], --minSplitSize=[-1],
>> --outerProdBlockHeight=[30000], --output=[/user/myUser/Echant/SVD100],
>> --oversampling=[15], --overwrite=null, --pca=[true], --powerIter=[0],
>> --rank=[100], --reduceTasks=[3], --startPhase=[0], --tempDir=[temp],
>> --uHalfSigma=[false], --vHalfSigma=[false]}
>> Exception in thread "main" java.lang.StackOverflowError
>> at
>>
>> org.apache.mahout.math.hadoop.MatrixColumnMeansJob.run(MatrixColumnMeansJob.java:55)
>> at
>>
>> org.apache.mahout.math.hadoop.MatrixColumnMeansJob.run(MatrixColumnMeansJob.java:55)
>> at
>>
>> org.apache.mahout.math.hadoop.MatrixColumnMeansJob.run(MatrixColumnMeansJob.java:55)
>> ...
>>
>> I search online and didn't find a solution to my problem.
>>
>> Can you help me ?
>>
>> Thanks in advance,
>>
>> --
>> Kévin Moulart
>>
>
>
