{"version":"https:\/\/jsonfeed.org\/version\/1","title":"mathspp.com feed","home_page_url":"https:\/\/mathspp.com\/blog\/tags\/streamlit","feed_url":"https:\/\/mathspp.com\/blog\/tags\/streamlit.json","description":"Stay up-to-date with the articles on mathematics and programming that get published to mathspp.com.","author":{"name":"Rodrigo Gir\u00e3o Serr\u00e3o"},"items":[{"title":"Elo rating system simulation","date_published":"2022-01-25T00:00:00+01:00","id":"https:\/\/mathspp.com\/blog\/elo-rating-system-simulation","url":"https:\/\/mathspp.com\/blog\/elo-rating-system-simulation","content_html":"

Join me as I create a simulation that tries to test an Elo-based rating system for quizzes.<\/p>\n\n

\"Screenshot
Screenshot of the simulation web app.<\/figcaption><\/figure>

Introduction<\/a><\/h2>\n

In this article, I will tell you about a simulation that I built.\nThis simulation is built around a rating system that is based off of the Elo rating system<\/a>,\nand I will use Streamlit<\/a> to build the app that will control the simulation.\nThis will also make it easier to share the simulation with others.<\/p>\n

In short, I'll be walking you through the process of writing this code<\/a> and,\nin the end, the code I linked to in that GitHub repository is going to be used\nto host the Streamlit web app that you can play with live, here<\/a>.<\/p>\n

The screenshot above also refers to the same Streamlit web app.<\/p>\n

Elo-based rating system for quizzes<\/a><\/h2>\n

What I'm trying to do is design a decent rating system for a quiz app.\nThe idea is that the quiz questions will have a rating,\nand so will the “players”: the people answering the quiz.<\/p>\n

Every time a person answers a question, their rating gets adjusted depending on whether they answered the question correctly.\nSimilarly, the question's rating gets updated.\nIf the player answers correctly, the player's rating goes up and the question's goes down.\nIf the player answers incorrectly, the ratings change the other way around.<\/p>\n

So, how can we build such a system?<\/p>\n

The Elo rating system<\/a> is a system that attributes a numeric rating to players,\nin order to determine the relative skill of the players.\nThe Elo rating is probably best known for being the rating used in chess.<\/p>\n

I have seen the website chess.com use an Elo-like system for their chess problems:\nyou play the problem and, if you get it right, your problem-solving rating increases;\nat the same time, the rating of the problem decreases.\nIf you get it wrong, vice-versa.\nI want to try and mimic this functionality.<\/p>\n

The purpose of building a simple simulation is to try and see if my assumptions\nabout the rating system work, or if the system will go bonkers when used in real life!\nOf course, the simulation will represent a simplification of reality:<\/p>\n