The source files do not all contain the same variables, so each tab keeps its own inputs and fitted models.
Switch tabs to use the model built for that source. The calculations run locally in the browser.
This tab uses the original 1970–1982 Auto MPG data and compares linear regression, polynomial regression, KNN, and random forest.
Estimated fuel economy
Held-out metrics from the historical notebook.
This tab uses the smaller 1999/2008 vehicle-level sample. I use it mainly to test how well a model transfers between the two years.
Estimated combined fuel economy
The temporal split trains on 1999 and predicts 2008.
This tab predicts production-weighted fleet or vehicle-type MPG from the EPA annual trend tables. It is not an individual-car calculator.
Estimated fleet or class MPG
This table compares the same models on the held-out rows.
This tab puts the bundled historical, 1999/2008, and EPA trend rows into one comparison model. The source is included as an input because the row types are different.
Estimated MPG
The table shows the stored test results for the same mixed-source setup.
The NRCan model uses official 1995–2026 ratings. I download those larger files when I run the recent-data script instead of storing them in the repository.