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Can you recommend a text mining package in R that can be used against large volumes of data?
Secondly, is there a GUI available for any of the text mining packages in R?
Thirdly, is there another open source text mining program that is easy and intuitive to use?

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    $\begingroup$ For a next time, it would be better to ask two questions. $\endgroup$ – user88 Feb 14 '11 at 21:44
  • $\begingroup$ @mbq: well, "is there an open source text mining package with a GUI?" would probably cover all three questions pretty well, it kind of already is one question... $\endgroup$ – naught101 May 4 '12 at 2:54
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Please see the CRAN Task View on Natural Language Processing which includes, among others, the tm package already mentioned by Josh.

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See the tm package and this presentation by Stefan Theussl given at the 2010 R/Finance conference.

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Here are two further integrated projects:

  • Python Natural Language Toolkit (easy installation, good documentation)
  • Java MALLET (no experience with it, but looks promising; included in the link given by @Nick)

Both are open-source software.

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Sure, RapidMiner with the text mining extension.

There are many videos that show how it is done.

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GATE is very comprehensive. It also allows you to work with different languages and has an ontology editor.

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Andrew McCallum (UMass) has a few NLP related software projects available on his webpage. These are all in Java (I think) with source code available.

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Besides the CRAN Task View on Natural Language Processing mentioned by Dirk, there are quanteda package and NLP package.

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