https://github.com/shekhargulati/sentiment-analysis-python/tree/master/opinion-lexicon-English
https://www.nltk.org/book/ch05.html https://pythonprogramming.net/natural-language-toolkit-nltk-part-speech-tagging/
Each row:
- numnouns = number of nouns in review
- numverbs = number of verbs in review
- numadj = number of adjectives in review
- countexclaim = number of exclamation points (!) in review
- pos = number of positive words in review
- neg = number of negative words in review
- numwords = number of total words in review
- numsentences = number of sentences in review
- stars = star rating given
- logisticregression.py : Logistic Regression Classifier
- perceptronclassifier.py : Perceptron Classifier