4. RESULTS AND DISCUSSION
The ranking of the models was done as per the values obtained by the above-mentioned performance measures (Table 1). For the best model the errors (MBE, MAE, MARE, and RMSE) must approach a value closer zero while ME and R2 should approach to a value closer to unity.
Table 1 Measures used to evaluate performances of interpolation methods of 30 years of monthly precipitation data in Assam, India