module A = BatArray
module L = BatList
standard deviation of residuals
std_dev_res exp pred
raw Regression Error Characteristic Curve (raw means not scaled by a null model)
raw_REC_curve exp pred Cf. Bi, J. and Bennett, K.P., 2003. Regression error characteristic curves. In Proceedings of the 20th international conference on machine learning (ICML-03) (pp. 43-50).