[R] groups Rank

[Ragia Ibrahim]

thanks for replying, I attached the data frame for source "i" I want to sum the values and get the max value then add a new column called rank . That new column cell value for each source i and for specific id would be (value/max value) * count of rows that have the same criteria "same i and same id"
many thanksRagia

> Date: Fri, 4 Sep 2015 10:19:35 -0400
> Subject: Re: [R] groups Rank
> From: sarah.goslee at gmail.com
> To: ragia11 at hotmail.com
> CC: r-help at r-project.org
> 
> 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
 		 	   		  
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