Vmat                    Compute covariance matrix of residuals for
                        linear models fitted with complex survey data
nhanes2007              National Health and Nutrition Examination
                        Survey data, 2007-2008
svyCooksD               Modified Cook's D for models fitted with
                        complex survey data
svycollinear            Condition indexes and variance decompositions
                        in linear models fitted with complex survey
                        data
svydfbetas              dfbetas for models fitted with complex survey
                        data
svydffits               dffits for models fitted with complex survey
                        data
svyhat                  Leverages for models fitted with complex survey
                        data
svystdres               Standardized residuals for models fitted with
                        complex survey data
svyvif                  Variance inflation factors (VIF) for linear
                        models fitted with complex survey data
