=Disclaimer:

 This information is provided by Michael Friendly as a service to
 purchasers of ``Visualizing Categorical Data''.  It is provided "as is".  
 There are no warranties, expressed or implied, as to merchantability or 
 fitness for a particular purpose regarding the accuracy of the materials
 or code contained herein.

=Copying:

 Copyright (c) 1999,  Michael Friendly <friendly@yorku.ca>

 Permission is granted to make and distribute VERBATIM copies
 of this program provided this copyright and permission notice 
 and the above disclaimer are preserved on all copies.

 Permission is granted to copy and distribute MODIFIED versions 
 of this program under the conditions for verbatim copying, provided 
 that the entire resulting derived work is distributed under the terms 
 of a permission notice identical to this one, and that the author of
 a modified version include a line

   * Modified:  <name>                     <email>                   *

 beneath the line

   *  Author:  Michael Friendly            <friendly@yorku.ca>       *

 in the program header comment.

 Permission is granted to copy and distribute TRANSLATIONS of
 the embedded documentation into another language, under the above
 conditions for MODIFIED versions, except that this permission notice 
 may be included in translations instead of in the original English.