Re: summary:convert to weights

[Alec Stephenson <a.stephenson@lancaster.ac.uk>]

Alec Stephenson pointed out an example from S-Programming...

I did, although strictly speaking I pointed out an example from S
Programming and then gave an example based on this approach - the code
given is not from S Programming (and will only work on dataframes
containing only factors such as the tmp object that I created).  

Alec Stephenson                            tel +44 (0) 1524 593950
Department of Mathematics and Statistics   fax +44 (0) 1524 592681
Lancaster University            email a.stephenson@lancaster.ac.uk
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