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Linking to Yelp dataset (via a symlink)
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ln -s $HOME/Dropbox/sentiment-data/yelp/ yelp

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Toolkits
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Oliver Mason's Qtag program [http://phrasys.net/uob/om/software]

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For setting up Maximum Entropy Modeling Toolkit for Python and C++
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Main page [http://homepages.inf.ed.ac.uk/lzhang10/maxent_toolkit.html]
Source [https://github.com/lzhang10/maxent]
Wonderful documentation, except for the missing Python API reference [http://homepages.inf.ed.ac.uk/lzhang10/software/maxent/manual.pdf]

DEPENDENCIES
zlib [http://www.techsww.com/tutorials/libraries/zlib/installation/installing_zlib_on_ubuntu_linux.php]
libboost [apt-get]
jam [apt-get]

Important points
* L-BFGS is the default parameter estimating method in this toolkit.

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Preprocess movie data
==============================================================================

Use Qtag with the "underscore" and "process all files in directory" options
$ java -jar qtag.jar

Move the POS tagged data out to its own directory, for further processing
$ mv pos/tagged/ pos_tagged
$ mv neg/tagged/ neg_tagged

Tag data with position
$ python position_tagger.py -d pos 
$ python position_tagger.py -d neg 

Filter out for only adjectives
$ python adjectives_filter.py -d neg
$ python adjectives_filter.py -d pos

Filter out for only verbs
$ python verb_filter.py -d pos
$ python verb_filter.py -d neg

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Preprocess Yelp data
==============================================================================

Make yelp data look like movie data in terms of formatting, and limit to 1000 
per star rating
$ python preprocess_yelp.py -d yelp/default/1star_limited
$ python preprocess_yelp.py -d yelp/default/2star_limited
$ python preprocess_yelp.py -d yelp/default/3star_limited
$ python preprocess_yelp.py -d yelp/default/4star_limited
$ python preprocess_yelp.py -d yelp/default/5star_limited

Use Qtag with the "underscore" and "process all files in directory" options
$ java -jar qtag.jar

Move the POS tagged data out to its own directory, for further processing
$ mv 1star_limited/tagged/ 1star_limited_tagged
$ mv 2star_limited/tagged/ 2star_limited_tagged
$ mv 3star_limited/tagged/ 3star_limited_tagged
$ mv 4star_limited/tagged/ 4star_limited_tagged
$ mv 5star_limited/tagged/ 5star_limited_tagged

Tag data with position
$ python position_tagger.py -d yelp/default/1star_limited
$ python position_tagger.py -d yelp/default/2star_limited
$ python position_tagger.py -d yelp/default/3star_limited
$ python position_tagger.py -d yelp/default/4star_limited
$ python position_tagger.py -d yelp/default/5star_limited

Filter out for only adjectives
$ python adjectives_filter.py -d yelp/default/1star_limited
$ python adjectives_filter.py -d yelp/default/2star_limited
$ python adjectives_filter.py -d yelp/default/3star_limited
$ python adjectives_filter.py -d yelp/default/4star_limited
$ python adjectives_filter.py -d yelp/default/5star_limited

Filter out for only verbs
$ python verb_filter.py -d yelp/default/1star_limited
$ python verb_filter.py -d yelp/default/2star_limited
$ python verb_filter.py -d yelp/default/3star_limited
$ python verb_filter.py -d yelp/default/4star_limited
$ python verb_filter.py -d yelp/default/5star_limited