importFrom("graphics", "abline", "axis", "layout", "legend", "par",
           "plot", "plot.new", "points", "segments")
importFrom("grDevices", "rgb")
importFrom("stats", "na.omit", "printCoefmat", "qf", "qt", 
           "qchisq", "quantile", "sd", "var")
importFrom("utils", "combn")


export(
  bags,
  ckap,
  gac,
  icc,
  kra,
  sem,
  spi
)

S3method(plot, rel)
S3method(print, rel)
S3method(summary, rel)