subreddits related to r/quant
A place for redditors/serious people to discuss quantitative trading, statistical methods, econometrics, programming, implementation, automated strategies and bounce ideas off each other for constructive criticism, feel free to submit papers/links of things you find interesting.
A place for beginners to ask stupid questions and for experts to help them! /r/Machine learning is a great subreddit, but it is for interesting articles and news related to machine learning. Here, you can feel free to ask any question regarding machine learning.