markov-reddit

Use markov chains to generate new posts titles in a subreddit

There is three scripts:

• getPosts.js gets the last posts from a given subreddit and save their title
• trainMarkov.js uses the titles to create a markov chain
• generateMarkov.js uses the markov chain to generate new titles

Configuration

All of the configurations are in the config.json file. Here is an example:

{
    "SUBREDDIT": "showerthoughts",
    "POSTS_FILE": "./data/posts/posts-showerthoughts.txt",
    "COUNT": 10,

    "ORDER": 2,
    "MODEL_FILE": "./data/models/markov-showerthoughts-order2.json",

    "DEVIATION_TARGET": 6,
    "MAX_TRIES" : 100
}

• SUBREDDIT should be a valid subreddit name without the r/
• COUNT is the number of page in the subreddit to get
• ORDER is the size of the Ngrams used in the markov chain
• DEVIATION_TARGET is the minimum number of different branches in the markov chain the result should contain
• MAX_TRIES limits the number of tries to get to DEVIATION_TARGET

Usage

First clone the repo and install the dependencies

npm install

Tweak config.json as you want.

Get the posts with

node getPost.js

Generate a markov chain

node trainMarkov.js

You need to use this script each time you change the ORDER parameter.

Finally, generate a new title

node generateMarkov.js