R at Bet Better

Short, runnable R posts about open sports betting data: how much bookmakers keep, how well odds are priced, and how to work with the free files we publish. Every post uses data you can download and re-check yourself.

The book

R for Betting-Market Data: a free online book in six short chapters, from odds and margins to calibration, price moves and the JSON feed. Runnable code, open data, CC BY 4.0 (20 Oct 2026).

Posts

• How often tennis favourites win, by surface, in R (2 Nov 2026)
• NFL home field from closing prices in R (2 Nov 2026)
• How much do betting prices move before kick-off? Open the new dataset in R (30 Sep 2026)
• Pull the daily bookmaker margin index into R (28 Sep 2026)
• Turn betting odds into probabilities in R, and see what the bookmaker keeps (28 Sep 2026)
• Draw a calibration curve for betting odds in R (28 Sep 2026)

The package

The betbetter R package wraps the free API (win probabilities, fair odds, predicted scores, power rankings) with no key. A CRAN submission is in review; until it lands, install from source at gitlab.com/betbetterworld/betbetter-r.

Feed for readers and aggregators: /rstats/feed.xml. These posts are also syndicated on R-bloggers, the daily digest of the R community.

About this publication

• Title: R at Bet Better
• Publisher: Bet Better Pty Ltd, Australia
• Editor: Edward Glush (ORCID 0009-0008-4074-369X)
• First issue: 28 September 2026
• Frequency: irregular, several posts a month
• Format: online only, free to read, no registration
• Language: English
• Licence: text and data CC BY 4.0
• ISSN: applied for
• Contact: edward@betbetter.world

Data licensed CC BY 4.0, free to reuse with a credit. Model estimates, not advice. 18+. If gambling is causing you harm: gamblinghelponline.org.au.