This is a method for the generic function as.data.frame
  for the class of envelopes (see envelope.
The result is a data frame with columns
  containing the values of the function argument
  (usually named r), the function estimate for the original
  point pattern data (obs),
  the upper and lower envelope limits (hi and lo),
  and possibly additional columns.
  
If simfuns=TRUE, the result also includes columns of values
  of the simulated functions that were used to compute the envelope.
  This is possible only when the envelope was computed with the
  argument savefuns=TRUE in the call to envelope.