exportPattern("^[[:alpha:]]+")
import(
	methods
)
exportMethods(
    "summary" 
)
exportClasses(
    "longCat" 
)
importFrom("grDevices", "cm.colors", "gray", "heat.colors", "rainbow",
           "terrain.colors", "topo.colors")
importFrom("graphics", "axis", "legend", "lines", "plot", "points",
           "text", "title")
importFrom("stats", "aggregate", "runif", "var")
