LSA clustering with L_2 should be nearly the same as L_2 clustering in the original because the point of SVD is to provide the projection that best preserves L_2 distances.
On Mon, Jun 4, 2012 at 7:44 PM, Dmitriy Lyubimov <[email protected]> wrote: > 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 > >> >> >> >>>> >>> >>>>> > >> >> >> >>>> >>> > >> >> >> >>>> > >> >> >> > >> >> > >> >
