You can download the pre-trained Google word2vec vectors trained on Google news here - https://code.google.com/p/word2vec/ The name of the file is GoogleNews-vectors-negative300.bin.gz

The required dataset is already present in this project

To know the list of parameters accepted by the program type

python src/SentimentClassifierDemo.py -h

The following parameters are required to run the program

Run the code with the following parameters as follows.

python src/SentimentClassifierDemo.py 
    -word2vec_model GoogleNews-vectors-negative300.bin.gz 
    -positive_dataset positive_reviews.txt 
    -negative_dataset negative_reviews.txt 
    -validation_proportion 0.2 
    -log_file SentimentClassifier_log.txt

The code will display the ROC curve for the classifier and also will print the accuracy of the classifier along with the recall and precision of the positive sentiment class.

The ROC curve should look something like this:

If you want to build your own Word2Vec model rather than using the trained Google model, and then use that model for training the classifier, run the below file

python src/Word2VecBuilder.py -h

It accepts the below parameters

Run the code with the following parameters as follows:

python src/Word2VecModelBuilder.py
    -word2vec_model data/MyWord2VecModel.word2vec
    -corpus my_custom_data.txt
    -log_file Word2VecBuilder_log.txt

The code will display the ROC curve for the classifier and also will print the accuracy of the classifier along with the recall and precision of the positive sentiment class.

The ROC curve I got with custom corpus looked like this: