Mean Absolute Error (MAE) and Root mean squared error (RMSE) are two of the most common metrics used to measure accuracy for continuous variables. Not sure if I’m imagining it but I think there used…
J. Caraca-Valente, and I. Lopez-Chavarrias. KDD '00: Proceedings of the sixth ACM SIGKDD international conference on Knowledge discovery and data mining, page 497--505. New York, NY, USA, ACM Press, (2000)