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 >>
