Description

plot.ssym produces the graph in which the goodness-of-fit statistic Υ is based. This function also displays graphs of the deviance-type residuals versus the fitted values for the median and the skewness (or the relative dispersion) submodels. Under the presence of an uncensored sample, the function plot() produces a graph of the standardized individual-specific weights versus the ordinary residuals (i.e., a graph of ρ(\hat{{z}}_k) versus \hat{{z}}_k, k=1,…,n), and under the presence of a right-censored sample, the function plot() produces a graph of the survival function of the error distribution.