r/dataisbeautiful ·Tuesday, December 30, 2025

2 Updates
r/dataisbeautiful
0 012/29/2025

Three-Year Personal Data Project: Tracking 200+ Variables to Model Well-being

[OC] 1,000 Days of Life Tracking: Visualising 200+ Variables and Modeling Well-being using Naïve Bayes

A Reddit user shares a three-year personal project where they tracked 232 daily variables using a custom Android app to quantify their life. The project includes visualizations like a Life Gantt chart showing habit evolution and well-being trends based on mental, physical, and social fulfillment metrics. Inspired by the Bayesian Trap concept, the user applies Naïve Bayes modeling to objectively assess whether they are living according to their principles or merely following routines, aiming to update their life perspectives with data-driven insights.

Community Highlights

No comments were provided in the input, so there are no discussion highlights to summarize.

r/dataisbeautiful
0 012/29/2025

Six-Year Study Reveals Temperature's Strong Impact on Truck Fuel Economy

[OC] My truck's seasonally sinusoidal, but remarkably consistent fuel economy over the past ~6 years

A Reddit user tracked their truck's fuel economy over six years using Fuelly, discovering a clear seasonal pattern tied to temperature rather than snow or 4WD use. Fuel efficiency peaks in summer during highway trips at 60 mph, reaching over 30 MPG, but drops sharply above that speed. The data, plotted in Libre Calc, shows consistent driving habits year-round, with efficiency declining well before snowfall. This highlights how external temperature significantly affects vehicle performance, independent of driving style or road conditions.

Community Highlights

Commenters praised the meticulous data collection and clear visualization, noting its value for understanding real-world vehicle efficiency. Many shared similar experiences with seasonal fuel economy variations, discussing factors like tire pressure, engine warm-up time, and fuel formulations. Several users suggested correlating the data with local temperature records to strengthen the temperature-dependency claim, while others humorously debated the merits of driving at 60 mph versus faster speeds.