"SubtimeDataFrame"data.frame
  and, for each row, a subtime.
  This class is provided to deal with subtime data. This class
  is compatible
  with TimeIntervalDataFrame
  and TimeInstantDataFrame.To list all methods available for SubtimeDataFrame, type in the R console :
  methods(class='SubtimeDataFrame') # for S3 methods}
  showMethods(class='SubtimeDataFrame') # for S4 methods}
  To get back to this documentation from the R console :
  
  class?SubtimeDataFrame
  The construction of the class allows to manipulate objects as if they
  were data.frame (see 
  Finally, some specific methods allow to easily deal with agregation of data over time
  properties (day, hour, week, special or specific time).
new("SubtimeDataFrame", ...)...argument must be replaced
    by named arguments coresponding to slots of a SubtimeDataFrame (see below).
    See alsonew.SubtimeDataFrame (when, data=NULL, ...)Arguments of the function correspond to object slots. SeeSubtimeDataFramefor details.as.SubtimeDataFrame (from, representation, cursor=NULL, FUN=mean, ...)Converting object to SubtimeDataFrame.TimeInstantDataFrame, TimeIntervalDataFrame,
  subtime