create_profiles         Create profiles of observed variables using
                        two-step cluster analysis
cross_validate          Returns statistics from double-split cross
                        validation
detect_outliers         Identifies potential outliers
plot.prcr               Return plot of cluster centroids
plot_r_squared          Plot R^2 (r-squared) values for a range of
                        number of profiles
print.prcr              Prints details of prcr cluster solution
summary.prcr            Concise summary of prcr cluster solution
