[R] simple help request

[stephen sefick]

# I am sure there is a better way than this
a <- c(1,6,10,11,3,5,10)
group <- c(5,5,5,5,9,9,9)
my.df <- cbind(a,group)
a.5 <- subset(my.df, group==5)
median(a.5[,1])
a.9 <- subset(my.df, group==9)
median(a.9[,1])

# MASS 4 is a good book

On Fri, Aug 1, 2008 at 1:30 PM, Lotta R <lottajane at gmail.com> wrote:
> Hi all,
>
> I have data that looks like
>
> number|grouping
>
>
> I would like to preform stats for each grouping
>
> so
>
> 1|5
> 6|5
> 10|5
> 11|5
> 3|9
> 5|9
> 10|9
>
> Say I would like to take the median for above, I should be returned 2 lines,
> one for group #5 and one for group #9
>
> Does this make sense?
>
> I am sorry for the basic question, can someone give me the name of a good
> book as well?
>
> Thanks,
> Lotta
>
>        [[alternative HTML version deleted]]
>
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> and provide commented, minimal, self-contained, reproducible code.
>



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