import("arules")
importFrom("graphics", "par", "plot", "mtext", "text", "axis", "box")
importFrom("stats", "median", "kmeans", "cutree", "dist", "hclust")
importFrom("grDevices", "hcl", "rgb", "gray.colors", "gray", "col2rgb")
importFrom("methods", "is", "as", "new")
importFrom("utils", "head", "installed.packages")
import("grid") ### need to use as depends in DESCRIPTION because of vcd
#import(igraph) ### we use now igraph::
importFrom("seriation", "seriate", "ser_permutation", "set_seriation_method", 
  "permute", "get_order")
importFrom("scatterplot3d", "scatterplot3d")
importFrom("vcd", "mosaic", "doubledecker")
importFrom("colorspace", "heat_hcl", "sequential_hcl")

export("saveAsGraph")

S3method(plot, rules)
S3method(plot, itemsets)
S3method(plot, grouped_matrix)
