exportPattern("^[[:alpha:]]+")
importFrom("grDevices", "dev.new", "gray")
importFrom("graphics", "abline", "frame", "lines", "matplot", "mtext","par", "plot", "points", "polygon", "title", "axis", "box") # axis and box for apc.indiv
importFrom("stats", "binomial", "gaussian", "glm.fit", "pbinom","pchisq", "pf", "pnorm", "poisson", "ppois", "pt", "qnorm", "qt", "quasipoisson", "summary.glm", "median", "model.matrix") # median and model.matrix for apc.indiv
importFrom("lattice", "levelplot")
importFrom("plyr","ddply","join") # join for apc.indiv	 
importFrom("reshape","cast")