exportPattern("^[[:alpha:]]+")
S3method(summary,graph.freq)
S3method(plot,graph.freq)
S3method(plot,AMMI)
S3method(plot,group)
import(cluster)
import(MASS)
import(nlme)
import(AlgDesign)
import(utils)
importFrom("graphics", "layout", "abline", "arrows", "axis", "barplot", "legend",
     "lines", "plot", "points", "rect", "segments", "text")
     importFrom("stats", "AIC", "BIC", "anova", "aov", "as.dendrogram",
     "as.dist", "as.formula", "chisq.test", "coef", "cutree",
     "density", "deviance", "df.residual", "dist", "dt",
     "formula", "hclust", "integrate", "lm", "median", "na.omit",
     "p.adjust", "pchisq", "pf", "pnorm", "predict", "princomp",
     "pt", "ptukey", "qchisq", "qf", "qnorm", "qt", "qtukey",
     "quantile", "residuals", "rnorm", "runif", "sd", "var",
     "vcov","uniroot")     
     importFrom("grDevices", "colors")
