[R] creating dummy variables

Rolf Turner rolf.turner at xtra.co.nz
Sun Apr 21 03:16:19 CEST 2013

On 21/04/13 10:56, Eva Prieto Castro wrote:
> Hi,
> Why do you write that dummy variables are not needed in R?. I would like you explain it.

As others have said --- do some self-study.  But a brief answer is that 
in any
"reasonable" modelling problem in which dummy variables might arise, R 
the dummy variables that it uses automagically , behind the scenes, from 
the *factors*
whose levels correspond to the dummy variables.

Summary:  Learn about and understand *factors*; forget about dummy


         Rolf Turner

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