These are methods for cbind
  and rbind for hyperframes.
  
Note that all the arguments must be hyperframes (because of
  the peculiar dispatch rules of cbind and
  rbind).
To combine a hyperframe with a data frame, one should either 
  convert the data frame to a hyperframe using
  as.hyperframe, or explicitly invoke the
  function cbind.hyperframe or rbind.hyperframe.
  
In other words: if h is a hyperframe and d is a data frame,
  the result of cbind(h,d) will be the same as
  cbind(as.data.frame(h), d), so that all hypercolumns
  of h will be deleted (and a warning will be issued).
  To combine h with d
  so that all columns of h are retained,
  type either cbind(h, as.hyperframe(d)) or
  cbind.hyperframe(h,d).