exportPattern("^[[:alpha:]]+")
importFrom("stats", "dist", "kmeans", "sd", "spline", "median", "quantile", "cutree", "hclust")
importFrom("pdist", "pdist")
importFrom("grDevices", "dev.new")
importFrom("graphics", "par", "plot.default", "points")
importFrom("kohonen", "som")
importFrom("class", "somgrid")