| initialize_param | Neutral initialization of starting values | 
| plot.robpolycor | Plot method for classes '"robpolycor"' and '"polycor"'. | 
| polycor | Robust estimation of polychoric correlation | 
| polycormat | Robust estimation of polychoric correlation matrix | 
| polycormat_mle | Maximum likelihood estimation of polychoric correlation matrix | 
| polycor_mle | Maximum likelihood estimation of polychoric correlation coefficient | 
| print.robpolycor | Print method for classes '"robpolycor"' and '"polycor"'. | 
| vcov.robpolycor | Obtain estimated asymptotic variance-covariance matrix |