exportPattern("^[[:alpha:]]+")
  importFrom("grDevices", "colorRampPalette", "dev.new", "dev.off",
             "png", "topo.colors")
  importFrom("graphics", "contour", "image", "legend", "lines", "par")
  importFrom("utils", "read.table", "write.table")

importFrom("utils", "setTxtProgressBar", "txtProgressBar")
