exportPattern("^[[:alpha:]]+")
importFrom("grDevices", "adjustcolor", "heat.colors")
importFrom("graphics", "box", "boxplot", "lines", "plot", "polygon", "rect", "text")
importFrom("stats", "lag", "median", "pnorm", "qnorm", "quantile", "runif", "time", "ts")
importFrom("methods", "is")



