Objects can be created by calls of the form new("vglmff", ...).
Warning
VGAM family functions are not compatible with
glm, nor gam (from either
gam or mgcv packages).
References
Yee, T. W. and Wild, C. J. (1996)
Vector generalized additive models.
Journal of the Royal Statistical Society, Series B, Methodological,
58, 481--493.