RE: #2: I'd suggest to read LSA papers (Deerwester's, Dumais, they had more than one of them) to see how they address efficacy analysis of LSA there. SSVD is nothing but an SVD method, Mahout SVD's accuracy analysis is part of Nathan Halko's dissertation (linked to under "Papers" here: https://cwiki.apache.org/confluence/display/MAHOUT/Stochastic+Singular+Value+Decomposition).
RE:#1: I am not sure i read any work actually trying to figure clusters on LSA outputs. Which may just mean i didn't read enough on the topic. There's an eigenspokes value which pretty much is devoted to sphere-projected clusters produced by SVD on the social data, but i don't think they included LSA output in any of their claims. However, you may want to check that paper out. LSA is more about recall/precision/semantic distance hints (such as context-based polisemy) rather than topic clustering. However, *i think,* if there're any eigenspoke "clusters" in the LSA output, they better be projected on the sphere first in order to detect them more clearly. (see hyperspherical coordinates). I never did the latter so that's just my guess. check out the papers for more info. -d On Mon, Jun 4, 2012 at 12:11 AM, Peyman Mohajerian <[email protected]> wrote: > So now that LSA works but clustering of two newsgroups is not accurate > based on my subjective observation. I had two questions: > 1) Does it make sense to use Canopy before k-mean step to get a better idea > of the number of clusters or the output from SSVD can help in that regard? > Currently I pass the number of clusters as input parameter. > 2) What is a good way to assess the accuracy of the result, is there some > data set that is already clustered with certain tuning parameter that I can > use to gain some confidence? Using Newsgroups of different topics may not > be the best input since we aren't doing a regular clustering based on word > count. > > Thanks > Peyman > > On Fri, Apr 6, 2012 at 1:05 PM, Dmitriy Lyubimov <[email protected]> wrote: > >> Ok, cool. >> >> I think writing MR output into your input folder is not a good >> practice in general in Hadoop world regardless of a job. Glad you had >> it resolved. >> >> On Fri, Apr 6, 2012 at 9:55 AM, Peyman Mohajerian <[email protected]> >> wrote: >> > Dmitriy, >> > >> > I did downgrade my hadoop and got the same error; however your last >> > suggestion worked, I moved the output path to a whole different directory >> > and this particular problem went away. >> > >> > Thanks Much, >> > Peyman >> > >> > On Thu, Apr 5, 2012 at 12:38 PM, Dmitriy Lyubimov <[email protected]> >> wrote: >> > >> >> also i notice that you are using output as a subfolder of your input? >> >> if so, it is probably going to create some mess. If so, please don't >> >> use folders for input and output spec which are nested w.r.t. each >> >> other. This is not expected. >> >> >> >> -d >> >> >> >> On Thu, Apr 5, 2012 at 12:00 PM, Peyman Mohajerian <[email protected]> >> >> wrote: >> >> > Ok, great, I'll give these ideas a try later today, the input is the >> >> > following line(s) that in my code sample was commented out using ';' >> in >> >> > Clojure. >> >> > The first stage, Q-job is done fine, it is the second job that gets >> >> messed >> >> > up, the output of Q-job is at: >> >> > /lsa4solr/matrix/14099700861483/transpose-213/SSVD-out/Q-job and >> >> > /lsa4solr/matrix/14099700861483/transpose-213/SSVD-out/Q-job but >> BtJob is >> >> > looking for the input in the wrong place, it must be hadoop version as >> >> you >> >> > said. >> >> > >> >> > input path #<Path >> >> > hdfs://localhost:9000/lsa4solr/matrix/15835804941333/transpose-120> >> >> > dd #<Path[] [Lorg.apache.hadoop.fs.Path;@5563d208> >> >> > numCol 1000 >> >> > numrow 15982 >> >> > >> >> > >> >> > On Thu, Apr 5, 2012 at 11:54 AM, Dmitriy Lyubimov <[email protected]> >> >> wrote: >> >> > >> >> >> Another idea i have is to try to run it from just Mahout command >> line, >> >> >> see if it works with .205. If it does, it is definitely something >> >> >> about passing parameters in/client hadoop classpath/ etc. >> >> >> >> >> >> On Thu, Apr 5, 2012 at 11:51 AM, Dmitriy Lyubimov <[email protected] >> > >> >> >> wrote: >> >> >> > also you are printing your input path -- how does it look like in >> >> >> > reality? because this path that it complains about, >> SSVDOutput/data, >> >> >> > in fact should be the input path. That's what's perplexing. >> >> >> > >> >> >> > We are talking hadoop job setup process here, nothing specific to >> the >> >> >> > solution itself. And job setup/directory management fails for some >> >> >> > reason. >> >> >> > >> >> >> > On Thu, Apr 5, 2012 at 11:45 AM, Dmitriy Lyubimov < >> [email protected]> >> >> >> wrote: >> >> >> >> Any chance you could test it with its current dependency, >> 0.20.204? >> >> or >> >> >> >> that would be hard to stage? >> >> >> >> >> >> >> >> Newer hadoop version is frankly all i can think of here for the >> >> reason >> >> >> of this. >> >> >> >> >> >> >> >> On Thu, Apr 5, 2012 at 11:35 AM, Peyman Mohajerian < >> >> [email protected]> >> >> >> wrote: >> >> >> >>> Hi Dmitriy, >> >> >> >>> >> >> >> >>> It is a Clojure code from: >> https://github.com/algoriffic/lsa4solr >> >> >> >>> Of course I modified it to use Mahout .6 distribution, also >> running >> >> on >> >> >> >>> hadoop-0.20.205.0, here is the Closure code that I changed, >> >> >> >>> the lines after ' decomposer (doto (.run ssvdSolver)) ' still >> need >> >> >> >>> modification b/c I'm not reading the eigenValue/Vector from the >> >> solver >> >> >> >>> correctly. Originally this code was based on Mahout .4. I'm >> >> creating >> >> >> the >> >> >> >>> Matrix from Solr 3.1.0, very similar to what was done on: ' >> >> >> >>> https://github.com/algoriffic/lsa4solr' >> >> >> >>> >> >> >> >>> Thanks, >> >> >> >>> >> >> >> >>> (defn decompose-svd >> >> >> >>> [mat k] >> >> >> >>> ;(println "input path " (.getRowPath mat)) >> >> >> >>> ;(println "dd " (into-array [(.getRowPath mat)])) >> >> >> >>> ;(println "numCol " (.numCols mat)) >> >> >> >>> ;(println "numrow " (.numRows mat)) >> >> >> >>> (let [eigenvalues (new java.util.ArrayList) >> >> >> >>> eigenvectors (DenseMatrix. (+ k 2) (.numCols mat)) >> >> >> >>> numCol (.numCols mat) >> >> >> >>> config (.getConf mat) >> >> >> >>> rawPath (.getRowPath mat) >> >> >> >>> outputPath (Path. (str (.toString rawPath) "/SSVD-out")) >> >> >> >>> inputPath (into-array [rawPath]) >> >> >> >>> ssvdSolver (SSVDSolver. config inputPath outputPath 1000 k 60 >> 3) >> >> >> >>> decomposer (doto (.run ssvdSolver)) >> >> >> >>> V (normalize-matrix-columns (.viewPart (.transpose >> eigenvectors) >> >> >> >>> (int-array [0 0]) >> >> >> >>> (int-array [(.numCols mat) k]))) >> >> >> >>> U (mmult mat V) >> >> >> >>> S (diag (take k (reverse eigenvalues)))] >> >> >> >>> {:U U >> >> >> >>> :S S >> >> >> >>> :V V})) >> >> >> >>> >> >> >> >>> >> >> >> >>> >> >> >> >>> >> >> >> >>> >> >> >> >>> On Thu, Apr 5, 2012 at 11:10 AM, Dmitriy Lyubimov < >> >> [email protected]> >> >> >> wrote: >> >> >> >>> >> >> >> >>>> Yeah. i don't see how it may have arrived at that error. >> >> >> >>>> >> >> >> >>>> >> >> >> >>>> Peyman, >> >> >> >>>> >> >> >> >>>> I need to know more -- it looks like you are using embedded api, >> >> not a >> >> >> >>>> command line, so i need to see how you you initialize the solver >> >> and >> >> >> >>>> also which version of Mahout libraries you are using (your stack >> >> trace >> >> >> >>>> numbers do not correspond to anything reasonable on current >> trunk). >> >> >> >>>> >> >> >> >>>> thanks. >> >> >> >>>> >> >> >> >>>> -d >> >> >> >>>> >> >> >> >>>> On Thu, Apr 5, 2012 at 10:55 AM, Dmitriy Lyubimov < >> >> [email protected]> >> >> >> >>>> wrote: >> >> >> >>>> > Hm. i never saw that and not sure where this folder comes >> from. >> >> >> Which >> >> >> >>>> > hadoop version are you using? This may be a result of >> >> incompatible >> >> >> >>>> > support for multiple outputs in the newer hadoop versions . I >> >> tested >> >> >> >>>> > it with CDH3u0/u3 and it was fine. This folder should normally >> >> >> appear >> >> >> >>>> > in the conversation, i suspect it is an internal hadoop thing. >> >> >> >>>> > >> >> >> >>>> > This is without me actually looking at the code per stack >> trace. >> >> >> >>>> > >> >> >> >>>> > >> >> >> >>>> > On Thu, Apr 5, 2012 at 5:22 AM, Peyman Mohajerian < >> >> >> [email protected]> >> >> >> >>>> wrote: >> >> >> >>>> >> Hi Guys, >> >> >> >>>> >> I'm now using ssvd for my LSA code and get the following >> error, >> >> at >> >> >> the >> >> >> >>>> time >> >> >> >>>> >> of error all I have under 'SSVD-out' folder: >> >> >> >>>> >> Q-job/QHat-m-00000< >> >> >> >>>> >> >> >> >> >> >> http://localhost:50075/browseDirectory.jsp?dir=%2Flsa4solr%2Fmatrix%2F14099700861483%2Ftranspose-213%2FSSVD-out%2FQ-job%2FQHat-m-00000&namenodeInfoPort=50070 >> >> >> >>>> >& >> >> >> >>>> >> R-m-00000< >> >> >> >>>> >> >> >> >> >> >> http://localhost:50075/browseDirectory.jsp?dir=%2Flsa4solr%2Fmatrix%2F14099700861483%2Ftranspose-213%2FSSVD-out%2FQ-job%2FR-m-00000&namenodeInfoPort=50070 >> >> >> >>>> >& >> >> >> >>>> >> _SUCCESS< >> >> >> >>>> >> >> >> >> >> >> http://localhost:50075/browseDirectory.jsp?dir=%2Flsa4solr%2Fmatrix%2F14099700861483%2Ftranspose-213%2FSSVD-out%2FQ-job%2F_SUCCESS&namenodeInfoPort=50070 >> >> >> >>>> >& >> >> >> >>>> >> part-m-00000.deflate< >> >> >> >>>> >> >> >> >> >> >> http://localhost:50075/browseDirectory.jsp?dir=%2Flsa4solr%2Fmatrix%2F14099700861483%2Ftranspose-213%2FSSVD-out%2FQ-job%2Fpart-m-00000.deflate&namenodeInfoPort=50070 >> >> >> >>>> > >> >> >> >>>> >> >> >> >> >>>> >> I'm not clear where '/data' folder is supposed to be set, is >> it >> >> >> part of >> >> >> >>>> the >> >> >> >>>> >> output of the QJob, I don't see any error in the QJob*? >> >> >> >>>> >> >> >> >> >>>> >> *Thanks,* >> >> >> >>>> >> * >> >> >> >>>> >> SEVERE: java.io.FileNotFoundException: File does not exist: >> >> >> >>>> >> >> >> >> >>>> >> >> >> >> >> >> hdfs://localhost:9000/lsa4solr/matrix/15835804941333/transpose-120/SSVD-out/data >> >> >> >>>> >> at >> >> >> >>>> >> >> >> >> >>>> >> >> >> >> >> >> org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:534) >> >> >> >>>> >> at >> >> >> >>>> >> >> >> >> >>>> >> >> >> >> >> >> org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat.listStatus(SequenceFileInputFormat.java:63) >> >> >> >>>> >> at >> >> >> >>>> >> >> >> >> >>>> >> >> >> >> >> >> org.apache.hadoop.mapreduce.lib.input.FileInputFormat.getSplits(FileInputFormat.java:252) >> >> >> >>>> >> at >> >> >> >>>> >> >> org.apache.hadoop.mapred.JobClient.writeNewSplits(JobClient.java:954) >> >> >> >>>> >> at >> >> >> org.apache.hadoop.mapred.JobClient.writeSplits(JobClient.java:971) >> >> >> >>>> >> at >> >> >> org.apache.hadoop.mapred.JobClient.access$600(JobClient.java:172) >> >> >> >>>> >> at >> >> org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:889) >> >> >> >>>> >> at >> >> org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:842) >> >> >> >>>> >> at java.security.AccessController.doPrivileged(Native >> Method) >> >> >> >>>> >> at javax.security.auth.Subject.doAs(Subject.java:396) >> >> >> >>>> >> at >> >> >> >>>> >> >> >> >> >>>> >> >> >> >> >> >> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059) >> >> >> >>>> >> at >> >> >> >>>> >> >> >> >> >> org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:842) >> >> >> >>>> >> at org.apache.hadoop.mapreduce.Job.submit(Job.java:465) >> >> >> >>>> >> at >> >> >> >>>> >> >> org.apache.mahout.math.hadoop.stochasticsvd.BtJob.run(BtJob.java:505) >> >> >> >>>> >> at >> >> >> >>>> >> >> >> >> >>>> >> >> >> >> >> >> org.apache.mahout.math.hadoop.stochasticsvd.SSVDSolver.run(SSVDSolver.java:347) >> >> >> >>>> >> at >> >> >> lsa4solr.mahout_matrix$decompose_svd.invoke(mahout_matrix.clj:188) >> >> >> >>>> >> at >> >> >> >>>> >> >> >> >> >>>> >> >> >> >> >> >> lsa4solr.clustering_protocol$decompose_term_doc_matrix.invoke(clustering_protocol.clj:125) >> >> >> >>>> >> at >> >> >> >>>> >> >> >> >> >>>> >> >> >> >> >> >> lsa4solr.clustering_protocol$cluster_kmeans_docs.invoke(clustering_protocol.clj:142) >> >> >> >>>> >> at >> lsa4solr.cluster$cluster_dispatch.invoke(cluster.clj:72) >> >> >> >>>> >> at lsa4solr.cluster$_cluster.invoke(cluster.clj:103) >> >> >> >>>> >> at lsa4solr.cluster.LSAClusteringEngine.cluster(Unknown >> >> Source) >> >> >> >>>> >> at >> >> >> >>>> >> >> >> >> >>>> >> >> >> >> >> >> org.apache.solr.handler.clustering.ClusteringComponent.process(ClusteringComponent.java:91) >> >> >> >>>> >> at >> >> >> >>>> >> >> >> >> >>>> >> >> >> >> >> >> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:194) >> >> >> >>>> >> at >> >> >> >>>> >> >> >> >> >>>> >> >> >> >> >> >> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:129) >> >> >> >>>> >> at >> org.apache.solr.core.SolrCore.execute(SolrCore.java:1360) >> >> >> >>>> >> at >> >> >> >>>> >> >> >> >> >>>> >> >> >> >> >> >> org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:356) >> >> >> >>>> >> at >> >> >> >>>> >> >> >> >> >>>> >> >> >> >> >> >> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:252) >> >> >> >>>> >> at >> >> >> >>>> >> >> >> >> >>>> >> >> >> >> >> >> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212) >> >> >> >>>> >> at >> >> >> >>>> >> >> >> >> >> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399) >> >> >> >>>> >> >> >> >> >>>> >> On Sun, Feb 26, 2012 at 4:56 PM, Dmitriy Lyubimov < >> >> >> [email protected]> >> >> >> >>>> wrote: >> >> >> >>>> >> >> >> >> >>>> >>> for the third time, in context of lsa, faster and hence >> perhaps >> >> >> better >> >> >> >>>> >>> alternative to lanczos is ssvd. Is there any specific reason >> >> you >> >> >> want >> >> >> >>>> >>> to use lanczos solver in context of LSA? >> >> >> >>>> >>> >> >> >> >>>> >>> -d >> >> >> >>>> >>> >> >> >> >>>> >>> On Sun, Feb 26, 2012 at 6:40 AM, Peyman Mohajerian < >> >> >> [email protected] >> >> >> >>>> > >> >> >> >>>> >>> wrote: >> >> >> >>>> >>> > Hi Guys, >> >> >> >>>> >>> > >> >> >> >>>> >>> > Per you advice I did upgrade to Mahout .6 and did a bunch >> of >> >> API >> >> >> >>>> >>> > changes and in the meantime realized I had a bug with my >> >> input >> >> >> >>>> matrix, >> >> >> >>>> >>> > zero rows read from Solr b/c multiple fields in Solr were >> >> index >> >> >> and >> >> >> >>>> >>> > not just the one I was interested in, that issues is fixed >> >> and >> >> >> I have >> >> >> >>>> >>> > a matrix with these dimensions: (.numCols mat) 1000 >> (.numRows >> >> >> mat) >> >> >> >>>> >>> > 15932 (or the transpose) >> >> >> >>>> >>> > Unfortunately I'm getting the below error now, in the >> context >> >> >> of some >> >> >> >>>> >>> > other Mahout algorithm there was a mention of '/tmp' vs >> >> '/_tmp' >> >> >> >>>> >>> > causing this issue but in this particular case the matrix >> is >> >> in >> >> >> >>>> >>> > memory!! I'm using this google package: guava-r09.jar >> >> >> >>>> >>> > >> >> >> >>>> >>> > SEVERE: java.util.NoSuchElementException >> >> >> >>>> >>> > at >> >> >> >>>> >>> >> >> >> >>>> >> >> >> >> >> >> com.google.common.collect.AbstractIterator.next(AbstractIterator.java:152) >> >> >> >>>> >>> > at >> >> >> >>>> >>> >> >> >> >>>> >> >> >> >> >> >> org.apache.mahout.math.hadoop.TimesSquaredJob.retrieveTimesSquaredOutputVector(TimesSquaredJob.java:190) >> >> >> >>>> >>> > at >> >> >> >>>> >>> >> >> >> >>>> >> >> >> >> >> >> org.apache.mahout.math.hadoop.DistributedRowMatrix.timesSquared(DistributedRowMatrix.java:238) >> >> >> >>>> >>> > at >> >> >> >>>> >>> >> >> >> >>>> >> >> >> >> >> >> org.apache.mahout.math.decomposer.lanczos.LanczosSolver.solve(LanczosSolver.java:104) >> >> >> >>>> >>> > at >> >> >> >>>> >>> >> >> lsa4solr.mahout_matrix$decompose_svd.invoke(mahout_matrix.clj:165) >> >> >> >>>> >>> > >> >> >> >>>> >>> > >> >> >> >>>> >>> > Any suggestion? >> >> >> >>>> >>> > Thanks, >> >> >> >>>> >>> > Peyman >> >> >> >>>> >>> > >> >> >> >>>> >>> > >> >> >> >>>> >>> > >> >> >> >>>> >>> > On Mon, Feb 20, 2012 at 10:38 AM, Dmitriy Lyubimov < >> >> >> >>>> [email protected]> >> >> >> >>>> >>> wrote: >> >> >> >>>> >>> >> Peyman, >> >> >> >>>> >>> >> >> >> >> >>>> >>> >> >> >> >> >>>> >>> >> Yes, what Ted said. Please take 0.6 release. Also try >> ssvd, >> >> it >> >> >> may >> >> >> >>>> >>> >> benefit you in some regards compared to Lanczos. >> >> >> >>>> >>> >> >> >> >> >>>> >>> >> -d >> >> >> >>>> >>> >> >> >> >> >>>> >>> >> On Sun, Feb 19, 2012 at 10:34 AM, Peyman Mohajerian < >> >> >> >>>> [email protected]> >> >> >> >>>> >>> wrote: >> >> >> >>>> >>> >>> Hi Dmitriy & Others, >> >> >> >>>> >>> >>> >> >> >> >>>> >>> >>> Dmitriy thanks for your previous response. >> >> >> >>>> >>> >>> I have a follow up question to my LSA project. I have >> >> managed >> >> >> to >> >> >> >>>> >>> >>> upload 1,500 documents from two different news groups >> (one >> >> >> about >> >> >> >>>> >>> >>> graphics and one about Atheism >> >> >> >>>> >>> >>> http://people.csail.mit.edu/jrennie/20Newsgroups/) to >> >> Solr. >> >> >> >>>> However my >> >> >> >>>> >>> >>> LanczosSolver in Mahout.4 does not find any eigenvalues >> >> >> (there are >> >> >> >>>> >>> >>> eigenvectors as you see in the follow up logs). >> >> >> >>>> >>> >>> The only things I'm doing different from >> >> >> >>>> >>> >>> (https://github.com/algoriffic/lsa4solr) is that I'm >> not >> >> >> using the >> >> >> >>>> >>> >>> 'Summary' field but rather the actual 'text' field in >> Solr. >> >> >> I'm >> >> >> >>>> >>> >>> assuming the issue is that Summary field already removes >> >> the >> >> >> noise >> >> >> >>>> and >> >> >> >>>> >>> >>> make the clustering work and the raw index data does >> not do >> >> >> that, >> >> >> >>>> am I >> >> >> >>>> >>> >>> correct or there are other potential explanations? For >> the >> >> >> desired >> >> >> >>>> >>> >>> rank I'm using values between 10-100 and looking for >> >> #clusters >> >> >> >>>> between >> >> >> >>>> >>> >>> 2-10 (different values for different trials), but always >> >> the >> >> >> same >> >> >> >>>> >>> >>> result comes out, no clusters found. >> >> >> >>>> >>> >>> If my issue is related to not having summarization done, >> >> how >> >> >> can >> >> >> >>>> that >> >> >> >>>> >>> >>> be done in Solr? I wasn't able to fine a Summary field >> in >> >> >> Solr. >> >> >> >>>> >>> >>> >> >> >> >>>> >>> >>> Thanks >> >> >> >>>> >>> >>> Peyman >> >> >> >>>> >>> >>> >> >> >> >>>> >>> >>> >> >> >> >>>> >>> >>> Feb 19, 2012 3:25:20 AM >> >> >> >>>> >>> >>> org.apache.mahout.math.decomposer.lanczos.LanczosSolver >> >> solve >> >> >> >>>> >>> >>> INFO: Lanczos iteration complete - now to diagonalize >> the >> >> >> >>>> tri-diagonal >> >> >> >>>> >>> >>> auxiliary matrix. >> >> >> >>>> >>> >>> Feb 19, 2012 3:25:20 AM >> >> >> >>>> >>> >>> org.apache.mahout.math.decomposer.lanczos.LanczosSolver >> >> solve >> >> >> >>>> >>> >>> INFO: Eigenvector 0 found with eigenvalue 0.0 >> >> >> >>>> >>> >>> Feb 19, 2012 3:25:20 AM >> >> >> >>>> >>> >>> org.apache.mahout.math.decomposer.lanczos.LanczosSolver >> >> solve >> >> >> >>>> >>> >>> INFO: Eigenvector 1 found with eigenvalue 0.0 >> >> >> >>>> >>> >>> Feb 19, 2012 3:25:20 AM >> >> >> >>>> >>> >>> org.apache.mahout.math.decomposer.lanczos.LanczosSolver >> >> solve >> >> >> >>>> >>> >>> INFO: Eigenvector 2 found with eigenvalue 0.0 >> >> >> >>>> >>> >>> Feb 19, 2012 3:25:20 AM >> >> >> >>>> >>> >>> org.apache.mahout.math.decomposer.lanczos.LanczosSolver >> >> solve >> >> >> >>>> >>> >>> INFO: Eigenvector 3 found with eigenvalue 0.0 >> >> >> >>>> >>> >>> Feb 19, 2012 3:25:20 AM >> >> >> >>>> >>> >>> org.apache.mahout.math.decomposer.lanczos.LanczosSolver >> >> solve >> >> >> >>>> >>> >>> INFO: Eigenvector 4 found with eigenvalue 0.0 >> >> >> >>>> >>> >>> Feb 19, 2012 3:25:20 AM >> >> >> >>>> >>> >>> org.apache.mahout.math.decomposer.lanczos.LanczosSolver >> >> solve >> >> >> >>>> >>> >>> INFO: Eigenvector 5 found with eigenvalue 0.0 >> >> >> >>>> >>> >>> Feb 19, 2012 3:25:20 AM >> >> >> >>>> >>> >>> org.apache.mahout.math.decomposer.lanczos.LanczosSolver >> >> solve >> >> >> >>>> >>> >>> INFO: Eigenvector 6 found with eigenvalue 0.0 >> >> >> >>>> >>> >>> Feb 19, 2012 3:25:20 AM >> >> >> >>>> >>> >>> org.apache.mahout.math.decomposer.lanczos.LanczosSolver >> >> solve >> >> >> >>>> >>> >>> INFO: Eigenvector 7 found with eigenvalue 0.0 >> >> >> >>>> >>> >>> Feb 19, 2012 3:25:20 AM >> >> >> >>>> >>> >>> org.apache.mahout.math.decomposer.lanczos.LanczosSolver >> >> solve >> >> >> >>>> >>> >>> INFO: Eigenvector 8 found with eigenvalue 0.0 >> >> >> >>>> >>> >>> Feb 19, 2012 3:25:20 AM >> >> >> >>>> >>> >>> org.apache.mahout.math.decomposer.lanczos.LanczosSolver >> >> solve >> >> >> >>>> >>> >>> INFO: Eigenvector 9 found with eigenvalue 0.0 >> >> >> >>>> >>> >>> Feb 19, 2012 3:25:20 AM >> >> >> >>>> >>> >>> org.apache.mahout.math.decomposer.lanczos.LanczosSolver >> >> solve >> >> >> >>>> >>> >>> INFO: Eigenvector 10 found with eigenvalue 0.0 >> >> >> >>>> >>> >>> Feb 19, 2012 3:25:20 AM >> >> >> >>>> >>> >>> org.apache.mahout.math.decomposer.lanczos.LanczosSolver >> >> solve >> >> >> >>>> >>> >>> INFO: LanczosSolver finished. >> >> >> >>>> >>> >>> >> >> >> >>>> >>> >>> >> >> >> >>>> >>> >>> On Sun, Jan 1, 2012 at 10:06 PM, Dmitriy Lyubimov < >> >> >> >>>> [email protected]> >> >> >> >>>> >>> wrote: >> >> >> >>>> >>> >>>> In Mahout lsa pipeline is possible with seqdirectory, >> >> >> seq2sparse >> >> >> >>>> and >> >> >> >>>> >>> ssvd >> >> >> >>>> >>> >>>> commands. Nuances are understanding dictionary format >> and >> >> llr >> >> >> >>>> >>> anaylysis of >> >> >> >>>> >>> >>>> n-grams and perhaps use a slightly better lemmatizer >> than >> >> the >> >> >> >>>> default >> >> >> >>>> >>> one. >> >> >> >>>> >>> >>>> >> >> >> >>>> >>> >>>> With indexing part you are on your own at this point. >> >> >> >>>> >>> >>>> On Jan 1, 2012 2:28 PM, "Peyman Mohajerian" < >> >> >> [email protected]> >> >> >> >>>> >>> wrote: >> >> >> >>>> >>> >>>> >> >> >> >>>> >>> >>>>> Hi Guys, >> >> >> >>>> >>> >>>>> >> >> >> >>>> >>> >>>>> I'm interested in this work: >> >> >> >>>> >>> >>>>> >> >> >> >>>> >>> >>>>> >> >> >> >>>> >>> >> >> >> >>>> >> >> >> >> >> >> http://www.ccri.com/blog/2010/4/2/latent-semantic-analysis-in-solr-using-clojure.html >> >> >> >>>> >>> >>>>> >> >> >> >>>> >>> >>>>> I looked at some of the comments and notices that >> there >> >> was >> >> >> >>>> interest >> >> >> >>>> >>> >>>>> in incorporating it into Mahout, back in 2010. I'm >> also >> >> >> having >> >> >> >>>> issues >> >> >> >>>> >>> >>>>> running this code due to dependencies on older >> version of >> >> >> Mahout. >> >> >> >>>> >>> >>>>> >> >> >> >>>> >>> >>>>> I was wondering if LSA is now directly available in >> >> Mahout? >> >> >> Also >> >> >> >>>> if I >> >> >> >>>> >>> >>>>> upgrade to the latest Mahout would this Clojure code >> >> work? >> >> >> >>>> >>> >>>>> >> >> >> >>>> >>> >>>>> Thanks >> >> >> >>>> >>> >>>>> Peyman >> >> >> >>>> >>> >>>>> >> >> >> >>>> >>> >> >> >> >>>> >> >> >> >> >> >>
