It is a factor, thank you for pointing me in the right direction.

Jacob

On Thu, Jan 13, 2011 at 11:12, Sarah Goslee <sarah.goslee@gmail.com> wrote:

> Hi Jacob,
>
> You don't give us enough information to answer your question. Specifically,
> what is your dataframe?
> str(data)
> would be helpful (and calling your data data is not usually wise).
>
> My guess is that Dags is actually a factor -- do you want it to be a
> factor? --
> and so you are retaining all of the levels. You need to think about how you
> are getting the data into R, whether you want a factor for that column, and
> whether you should drop the unused levels.
>
> Reading the help for factor may be enlightening.
>
> Sarah
>
> On Thu, Jan 13, 2011 at 3:57 AM, Jacob Kasper <jacobkasper@gmail.com>
> wrote:
> > I am using subset to select the data I want to use for my analysis and
> find
> > that after I subset my data frame on one column I get ghost values in the
> > other columns. here is an example:
> >
> >> table(data$Dags)
> >
> >           2008/04/12 2008/04/13 2008/04/16 2008/04/17 2008/04/19
> 2008/05/06
> >
> >       103        140         82        187        179        212
> 68
> >
> > 2008/05/07 2008/05/12 2008/05/15 2008/05/25 2008/05/28 2008/05/29
> 2009/04/17
> >
> >       184        308        120        227        250        150
>  259
> >
> > 2009/04/18 2009/04/20 2009/04/21 2009/05/04 2009/05/15 2009/06/09
> 2009/06/10
> >
> >       246        241        252        153        366        225
> 79
> >
> > 2009/06/24 2009/06/25 2009/06/26 2010/03/11 2010/04/27 2010/05/07
> 2010/05/08
> >
> >       126        278        297        135        285        286
>  275
> >
> > 2010/05/10 2010/05/11 2010/05/20 2010/05/21 2010/06/02 2010/07/20
> 2010/08/12
> >
> >       290         22        259        291        381         20
>  648
> >
> > 2010/08/16 2010/08/18
> >        11          2
> >
> >
> >> data10<-subset(data, data$Year==2010 & data$Recatpure1==1)
> >
> >> table(data10$Dags)
> >
> >           2008/04/12 2008/04/13 2008/04/16 2008/04/17 2008/04/19
> 2008/05/06
> >
> >         0          0          0          0          0          0
>  0
> >
> > 2008/05/07 2008/05/12 2008/05/15 2008/05/25 2008/05/28 2008/05/29
> 2009/04/17
> >
> >         0          0          0          0          0          0
>  0
> >
> > 2009/04/18 2009/04/20 2009/04/21 2009/05/04 2009/05/15 2009/06/09
> 2009/06/10
> >
> >         0          0          0          0          0          0
>  0
> >
> > 2009/06/24 2009/06/25 2009/06/26 2010/03/11 2010/04/27 2010/05/07
> 2010/05/08
> >
> >         0          0          0         23         38         20
> 29
> >
> > 2010/05/10 2010/05/11 2010/05/20 2010/05/21 2010/06/02 2010/07/20
> 2010/08/12
> >
> >        18          1         15         45         38          1
>  5
> >
> > 2010/08/16 2010/08/18
> >         0          0
> > How can I perform a subset so that these ghost values do not appear at
> all
> > in my new table?
> >
>
>
> --
> Sarah Goslee
> http://www.functionaldiversity.org
>

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