StepRegShinyApp() function and all Shiny-related dependenciesinst/shiny/ directory and all Shiny application filesUsers who were using the Shiny application should now install the separate StepRegShiny package:
# Install the new Shiny package
install.packages("StepRegShiny")
# Use the Shiny application
StepRegShiny::StepRegGUI()
The core StepReg functionality remains unchanged. Only the Shiny interface has been moved to a separate package for better modularity and independent development.
Strata Variables for Cox Regression: Added support for strata() function in Cox regression formulas. This allows users to fit stratified Cox models where separate baseline hazard functions are estimated for different groups while sharing regression coefficients across strata.
Continuous-Nested-Within-Class Effects: Added support for continuous-nested-within-class effects using the : operator in formulas. This allows modeling how continuous variables' effects vary across different levels of categorical variables.
train and test validation: this feature is used for valid inference when test_ratio is set between 0-1.
feature ratio: Proportion of candidate features sampled uniformly at random during forward selection (default = 1). This randomized selection helps identify the best variables while reducing the risk of overfitting, and is only valid when strategy is "forward"..
X:A vs A:X)