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Twitter analysis

vritualenv

First make sure pip and virtualenv are installed. Then create a virtual environment in the root dir by running:

virtualenv env

then activate the virtual env with

source env/bin/activate

(to get out of the virtualenv, run deactivate)

Dependencies

install all the dependencies with

pip install -r requirements.txt

also make sure to download nltk's corpus by running those line in python interpreter:

import nltk
nltk.download()

Credentials

Rename sample_credentials.json to credentials.json, and fill in the four credentials from your twitter app.

Real-time twitter trend discovery

Run bokeh serve --show real-time-twitter-trend-discovery.py --args <tw> <top_n_words> <*save_history>, where <tw> and <top_n_words> are arguments representing within what time window we treat tweets as a batch, and how many words with highest idf scores to show, while `<*save_history>`` is an optional boolean value indicating whether we want to dump the history. Make sure API credentials are properly stored in the credentials.json file.

Topic modeling and t-SNE visualization: 20 Newsgroups

To train a topic model and visualize the news in 2-D space, run python topic_20news.py --n_topics <n_topics> --n_iter <n_iter> --top_n <top_n> --threshold <threshold>, where <n_topics> being the number of topics we select (default 20), <n_iter> being the number of iterations for training an LDA model (default 500), <top_n> being the number of top keywords we display (default 5), and <threshold> being the threshold probability for topic assignment (default 0.0).

Scrape tweets and save them to disk

To scrape tweets and save them to disk for later use, run python scrape_tweets.py. If the script is interrupted, just re-run the same command so new tweets collected. The script gets ~1,000 English tweets per min, or 1.5 million/day.

Make sure API credentials are properly stored in the credentials.json file.

Topic modeling and t-SNE visualization: tweets

First make sure you accumulated some tweets, then run python topic_tweets.py --raw_tweet_dir <raw_tweet_dir> --num_train_tweet <num_train_tweet> --n_topics <n_topics> --n_iter <n_iter> --top_n <top_n> --threshold <threshold> --num_example <num_example>, where <raw_tweet_dir> being a folder containing raw tweet files, <num_train_tweet> being the number of tweets we use for training an LDA model, <n_topics> being the number of topics we select (default 20), <n_iter> being the number of iterations for training an LDA model (default 500), <top_n> being the number of top keywords we display (default 5), <threshold> being the threshold probability for topic assignment (default 0.0), and <num_example> being number of tweets to show on the plot (default 5000)