Dear all,
Thank for your friendliness.
I have read several documents and I'm sure that if I have time to read ALL
documents in the world I would not need to be part of this list, because of my
capabilities...
I have used this idea (factors) in several cases in which dummy variables
arise, but I asked about the question because (in relation with my humility) I
thought I had used the idea incorrectly. Nevertheless, I have noticed all I
know is all I have to know about this question.
Regards.
Eva
--- El dom, 21/4/13, Rolf Turner <rolf.tur...@xtra.co.nz> escribió:
De: Rolf Turner <rolf.tur...@xtra.co.nz>
Asunto: Re: [R] creating dummy variables
Para: "Eva Prieto Castro" <evapcas...@yahoo.es>
CC: "r-help@R-project.org" <r-help@r-project.org>
Fecha: domingo, 21 de abril, 2013 03:16
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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