metadata, data and processingLog.cm[["time"]], "u", "v", etc.  Items in
        metadata must be specifield by full name, but those in
        data may be abbreviated, so long as the abbreviation is unique.}    cm[["u"]] <- rep(35,100).}
    show method (e.g.
        show(cm)) displays information about the object.}
read.cm.  Statistical summaries are provided with
  summary.cm, while overviews are provided by show.
  Plots are provided with plot.cm.