Nn3.zip -

The series vary in length (68 to 144 observations) and include seasonal, non-seasonal, and "difficult" patterns with outliers and structural breaks. Key Strengths

The historical data is typically provided in vertical columns of varying lengths. nn3.zip

Contestants were traditionally required to forecast 18 points into the future. The series vary in length (68 to 144

11 monthly time series used as a small-scale pilot. nn3.zip

The NN3 competition was designed to evaluate how modern neural network (NN) and computational intelligence (CI) methods compare to traditional statistical benchmarks like those used in the M3 competition. Composition:

For modern use, researchers often access these files through the NN3 Official Website or data science repositories like Kaggle . Critical Reception