| stfit-package | stfit: Spatial-Temporal Functional Imputation Tool | 
| ARE | Absolute relative error | 
| epan | Epanicnicov kernel function | 
| getMask | Get image mask | 
| getMissingLayers | Get missing layer index | 
| landsat106 | Landsat data example | 
| landsat2 | Landsat data example | 
| landsatVis | Data visualization for landsat data | 
| lc_cov_1d | Local constant covariance estimation | 
| lc_cov_1d_est | Local constant covariance estimation | 
| llreg | Local linear regression | 
| lpreg | Local Polynomial Regression | 
| meanEst | STFIT Mean Estimation | 
| NMSE | Normalized Mean Square Estimation | 
| opts_stfit | Options for stfit | 
| outlier | Image Outlier Detection | 
| pctMissing | Missing value percentages | 
| rmOutlier | Remove outlier | 
| RMSE | Root Mean Square Estimation | 
| seffEst | STFIT Spatial Effect Estimation | 
| smooth_spline | Smoothing spline regression | 
| spreg | spline regression | 
| stfit_landsat | STFIT for Landsat data | 
| teffEst | STFIT Temporal Effect Estimation | 
| weightMatrix | Weight matrix calculation | 
| weightVector | Weight vector calculation |