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
creates
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
variables.
cheers,
Rolf Turner
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