In this lecture, the univariate twin model is extended to the bivariate twin model. It is explained how the variance in two traits is decomposed into additive genetic, non-additive genetic, and ...

Several different bandwidth selection methods are available in PROC KDE in the univariate case. Following the recommendations of Jones, Marron, and Sheather (1996), the default method follows a ...

specifies the bandwidth multipliers for the kernel density estimate. You should specify one number for univariate smoothing and two numbers separated by a comma for bivariate smoothing. The default ...