There is much more to learn about sentiment analysis than about Solr. I suggest getting one of these toolkits yourself, write some code, and make some charts.
Classification is a two-part process: first make a large dataset of "positive" & "negative" text and train a model to understand the difference. Second, use the model to evaluate unknown text. The second part could be added to Solr as an updating process, to include a positive/negative score with each document. The first part, training the model, is a batch process done outside. The Weka toolkit has more features than Lingpipe, OpenNLP, UIMA etc. I would start with that. And learn how to program with R. Lance On Fri, Jul 8, 2011 at 8:13 PM, Zheng Qin <qinzheng...@gmail.com> wrote: > Thanks, Bruno and Matthew. I saw that tutorial before and Lingpipe requires > a license while we are looking at open source solutions. We are not clear > yet on how to use Solr to do sentiment analysis. Does a NLP or learning tool > have to be used to accomplish this task? If a tool is needed, how it can be > integrated with Solr? Then, what are the steps? By using classification? We > are new to sentiment analysis and any suggestion is welcomed. > > On Sat, Jul 9, 2011 at 4:07 AM, Matthew Painter > <matthew.pain...@kusiri.com>wrote: > >> Note you can't use lingpipe commercially without a license though I >> believe. >> >> Sent from my iPhone >> >> On 8 Jul 2011, at 18:20, Bruno Adam Osiek <baos...@gmail.com> wrote: >> >> > Try Lingpipe. They use Language Models as their engine for sentiment >> analysis. At (http://alias-i.com/lingpipe/) you will find a step-by-step >> tutorial on how to implement it. >> > >> > On 07/08/2011 07:14 AM, Zheng Qin wrote: >> >> Hi, >> >> >> >> We are starting a project on Twitter data sentiment analysis. We have >> >> installed LucidWorks, which also has a Solr admin page. By reading the >> >> posts, it seems that sentiment analysis can be done by using OpenNLP or >> >> machine learning (Mahout or Weka). Can you share with us which tool is >> good >> >> at classifying positive/negative tweets? Also how to use it together >> with >> >> Solr (we only found one posted by Grant on March 16 2010 about >> integrating >> >> Solr with Mahout). Your reply will be appreciated. Thanks. >> >> >> > >> > -- Lance Norskog goks...@gmail.com
