The EnvStats functions listed below are useful for performing calibration and inverse prediction to determine the concentration of a chemical based on a machine signal.
| Function Name | Description | 
| anovaPE | Compute lack-of-fit and pure error ANOVA table for a | 
| linear model. | |
| calibrate | Fit a calibration line or curve. | 
| detectionLimitCalibrate | Determine detection limit based on using a calibration | 
| line (or curve) and inverse regression. | |
| inversePredictCalibrate | Predict concentration using a calibration line (or curve) | 
| and inverse regression. | |
| pointwise | Pointwise confidence limits for predictions. | 
| predict.lm | Predict method for linear model fits. |