| back_trans | Back-transformation |
| calculate_metrics | Reconstruction metrics |
| colScale | Scale columns of a matrix |
| colUnscale | Unscale columns of a matrix |
| cv_mb | Cross-validation |
| KGE | Kling-Gupta Efficiency |
| lsq_mb | Least square with mass balance penalty |
| make_Z | Make cross-validation folds. |
| mb_fit | Fit parameters with mass balance criterion |
| mb_reconstruction | Mass-balance-adjusted reconstruction |
| nRMSE | Normalized root-mean-square error |
| NSE | Nash-Sutcliffe Efficiency |
| obj_fun | Objective function from parameters |
| p1Seasonal | Seasonal streamflow at P.1 station |
| pc3seasons | Principal components of tree rings |
| prepend_ones | Prepend a column of ones |
| RE | Reduction of Error |
| rowScale | Scale rows of a Matrix |
| rowUnscale | Unscale rows of a matrix |