exportPattern("^[[:alpha:]]+")
importClassesFrom(sp,SpatialPolygonsDataFrame)
importFrom("reshape",melt)
importFrom("weights",wtd.cor)
importFrom("pscl",zeroinfl)
importFrom("MASS",ginv)
importFrom("graphics", "plot", "abline")
importFrom("stats", "cor", "dist", "p.adjust", "pnorm", "pt", "sd", "setNames", 
           "var", "AIC", "deviance", "optim", "rnorm", "rpois", "runif", "lm")