exportPattern("^[[:alpha:]]+")
importFrom("stats","pnorm","pchisq","cov","var","sd")
importFrom("graphics", "pairs", "plot","hist")
importFrom("grDevices", "dev.new")
importFrom("matrixcalc", "commutation.matrix", "vec") 
import("labstatR") 
import("polynom") 
import("expm") 


