Refer to the Rattle home page in the URL below for a growing reference
  manual for using Rattle.
Whilst the underlying functionality of Rattle is built upon a vast
  collection of other R packages, Rattle itself provides a collection of
  utility functions used within Rattle. These are made available through
  loading the rattle package into your R library. The See Also section
  lists these utility functions that may be useful outside of Rattle.
  
Rattle can initialise some options using a .Rattle file if the folder
  in which Rattle is started. The currently supported options are
  .RATTLE.DATA, .RATTLE.SCORE.IN, and .RATTLE.SCORE.OUT.
  
If the environment variable RATTLE\_DATA is defined then that is set
  as the default CSV file name to load. Otherwise, if .RATTLE.DATA is
  defined then that will be used as the CSV file to load. Otherwise, if
  csvname is provided then that will be used.
Two environments are exported by Rattle, capturing the current rattle
  state (crs) and the current rattle variables (crv).