The percentage of undernourished toddlers on Java Island averages 8.5 %. This number is relatively high compared to the average incidence undernutrition in Sumatra, 3.3%. study uses OLS, GWR, and GWANN explore data Island. We use cross-validation determine optimum bandwidth GWR methods. a single hidden layer with several neurons where selected based RMSE. indicators RMSE, MAE, MAPE best method ...