| addCovariate | Add covariate expression to a function string |
| addCovVar | Adding covariate to a given variable in an nlmixr2 model expression |
| backwardSearch | Backward covariate search |
| bootplot | Produce delta objective function for boostrap |
| bootplot.nlmixr2FitCore | Produce delta objective function for boostrap |
| bootstrapFit | Bootstrap nlmixr2 fit |
| covarSearchAuto | Stepwise Covariate Model-selection (SCM) method |
| forwardSearch | Forward covariate search |
| initializeCovars | Initializing covariates before estimation |
| makeDummies | Create categorical covariates |
| makeHockeyStick | Creating Hockey-stick covariates |
| nlmixrDataToMonolix | Convert nlmixr compatible data to other formats (if possible) |
| nlmixrDataToMrgsolve | Convert nlmixr compatible data to other formats (if possible) |
| nlmixrDataToNonmem | Convert nlmixr compatible data to other formats (if possible) |
| nlmixrDataToRxode | Convert nlmixr compatible data to other formats (if possible) |
| performNorm | Perform normalization of the covariate |
| preconditionFit | Linearly re-parameterize the model to be less sensitive to rounding errors |
| removeCovariate | Remove covariate expression from a function string |
| removeCovMultiple | Removing multiple covariates |
| removeCovVar | Remove covariate from function string |