exportPattern("*\\.ridge")
exportPattern("*\\.pcaridge")
exportPattern("precision\\.*")
exportPattern("ridge\\.*")
# also:
export(plot3d, ridge,  traceplot, trans.colors)
export(contourf)

#export(ridge, 
#	traceplot, trans.colors, 
#	coef.ridge, print.ridge, plot.ridge, pairs.ridge,  
#	pca.ridge, vcov.ridge, 
#	precision, precision.ridge, precision.lm, 
#	vif.ridge, plot3d.ridge, plot3d.pcaridge
#)

S3method(coef, ridge)
S3method(print, ridge)
S3method(plot, ridge)
S3method(plot, pcaridge)
S3method(pairs, ridge)
S3method(vcov, ridge)
S3method(precision, ridge)
S3method(precision, lm)
S3method(vif, ridge)
S3method(plot3d, ridge)
S3method(plot3d, pcaridge)
S3method(biplot, pcaridge)
S3method(biplot, ridge)
S3method(ridge, default)
S3method(ridge, formula)

importFrom(car, vif)
importFrom("grDevices", "col2rgb", "colorRampPalette", "contourLines",
           "gray", "rgb")
importFrom("graphics", "abline", "arrows", "barplot", "box", "contour",
           "matplot", "par", "plot", "polygon", "text")
importFrom("stats", "coef", "coefficients", "contrasts", "cov2cor",
           "lm.fit", "model.matrix", "model.offset", "model.response",
           "uniroot", "vcov")

# to make plot3d.ridge an S3 method; but this requires Depends: rgl
#importFrom(rgl, plot3d)