Papers › Evaluating Forecasts with scoringutils in R
Evaluating Forecasts with scoringutils in R
Nikos I. Bosse, Hugo Gruson, Anne Cori, Edwin van Leeuwen, Sebastian Funk, Sam Abbott
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Evaluating forecasts is essential to understand and improve forecasting and make forecasts useful to decision makers. A variety of R packages provide a broad variety of scoring rules, visualisations and diagnostic tools. One particular challenge, which scoringutils aims to address, is handling the complexity of evaluating and comparing forecasts from several forecasters across multiple dimensions such as time, space, and different types of targets. scoringutils extends the existing landscape by offering a convenient and flexible data.table-based framework for evaluating and comparing probabilistic forecasts (forecasts represented by a full predictive distribution). Notably, scoringutils is the first package to offer extensive support for probabilistic forecasts in the form of predictive quantiles, a format that is currently used by several infectious disease Forecast Hubs. The package is easily extendable, meaning that users can supply their own scoring rules or extend existing classes to handle new types of forecasts. scoringutils provides broad functionality to check the data and diagnose issues, to visualise forecasts and missing data, to transform data before scoring, to handle missing forecasts, to aggregate scores, and to visualise the results of the evaluation. The paper presents the package and its core functionality and illustrates common workflows using example data of forecasts for COVID-19 cases and deaths submitted to the European COVID-19 Forecast Hub.
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