[R] groups Rank

[Sarah Goslee]

Hi Ragia,

I can't make out your data or desired result, but it sounds like
aggregate() might get you started. If you need more help, please
repost your data using dput() and do NOT post in HTML so that we can
see what your desired result looks like.

Sarah

On Fri, Sep 4, 2015 at 10:12 AM, Ragia Ibrahim <ragia11 at hotmail.com> wrote:
> Dear Group,kinldy, I have the following data frame df
>          id value1           1  4   2           1  4   3           1  6   4           1  6   5           2  1.5   6           2  2.5  7           2  2.5   8           2  2.5
>
> add rank column regarding id coulmn where rank for the highest value would be 1, others rank would be the (value/ value of heighest)/ number of rows that took the same value
> thus the data frame should be
>         id value                    Rank1           1  4                    0.332           1  4                    0.333           1  6                    0.54           1  6                    0.55           2  1.5                  0.6   6           2  2.5                  0.337           2  2.5                  0.338           2  2.5                  0.33
>
> how to reach this resultthanks in advanceRagia
>         [[alternative HTML version deleted]]
>

-- 
Sarah Goslee
http://www.functionaldiversity.org