exportPattern("^[[:alpha:]]+")
S3method(plot, dbkGrad)
S3method(print, dbkGrad)
S3method(residuals, dbkGrad)
S3method(as.data.frame, dbkGrad)

importFrom("stats", "dbeta", "density", "qnorm", "quantile",
     "residuals")
importFrom(minpack.lm,nls.lm.control,nls.lm)
importFrom(SDD,ADF)
importFrom(TSA, acf)

importFrom(lattice,levelplot)
importFrom("grDevices", "trans3d")
importFrom("graphics", "abline", "axis", "layout", "matplot", "par",
             "persp", "plot", "plot.new", "points", "segments")
