Perfect! Thanx a lot!
:)
2010/4/21 Joshua Wiley <jwiley.ps...@gmail.com>
> Look at ?by
>
> for example
>
> by(data=v2, INDICES=v1, FUN=median, na.rm=TRUE)
>
> This will calculate the median of v2 (age) for each level of the
> indices v1 (in your case M and F).
>
>
> If you are only interested the median for a single level, Mohamed's
> solution is simpler.
>
> Josh
>
>
> On Wed, Apr 21, 2010 at 8:10 AM, Vlatka Matkovic Puljic
> <v.matkovic.pul...@gmail.com> wrote:
> > I have additional Q:
> >
> > v1 is gender (M=1 and F=2)
> > v2 is age
> >
> > I want R to calculate median only for M (1),
> > but my comand is not good :)
> >
> > while(v1=1){median(v2,na.rm=TRUE)}
> > Error: unexpected '=' in "while(Q2="
> >
> > 2010/4/21 Vlatka Matkovic Puljic <v.matkovic.pul...@gmail.com>
> >>
> >> Thank you!
> >>
> >> 2010/4/21 Joshua Wiley <jwiley.ps...@gmail.com>
> >>>
> >>> Hello,
> >>>
> >>> summary() removes NAs by default. You can get the same results using
> >>>
> >>> median(year, na.rm=TRUE)
> >>>
> >>> see ?median
> >>>
> >>> HTH,
> >>>
> >>> Josh
> >>>
> >>> On Wed, Apr 21, 2010 at 6:40 AM, Vlatka Matkovic Puljic
> >>> <v.matkovic.pul...@gmail.com> wrote:
> >>> > Hi,
> >>> >
> >>> > I have dataset n1 and v1 (years).
> >>> > when i ask
> >>> > median(year)
> >>> > [1] NA
> >>> >
> >>> > but if i put summary of dataset n1:
> >>> > summary(n1)
> >>> > R produces median (together with min/max/mean....)
> >>> >
> >>> > why it is so?
> >>> >
> >>> >
> >>> > --
> >>> > **************************
> >>> > Vlatka Matkovic Puljic
> >>> > 095/8618 171
> >>> >
> >>> > [[alternative HTML version deleted]]
> >>> >
> >>> > ______________________________________________
> >>> > R-help@r-project.org mailing list
> >>> > https://stat.ethz.ch/mailman/listinfo/r-help
> >>> > PLEASE do read the posting guide
> >>> > http://www.R-project.org/posting-guide.html
> >>> > and provide commented, minimal, self-contained, reproducible code.
> >>> >
> >>>
> >>>
> >>>
> >>> --
> >>> Joshua Wiley
> >>> Senior in Psychology
> >>> University of California, Riverside
> >>> http://www.joshuawiley.com/
> >>
> >>
> >>
> >> --
> >> **************************
> >> Vlatka Matkovic Puljic
> >> 095/8618 171
> >
> >
> >
> > --
> > **************************
> > Vlatka Matkovic Puljic
> > 095/8618 171
> >
>
>
>
> --
> Joshua Wiley
> Senior in Psychology
> University of California, Riverside
> http://www.joshuawiley.com/
>
--
**************************
Vlatka Matkovic Puljic
095/8618 171
[[alternative HTML version deleted]]
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