[R] Finding top 25% observations in Dplyr

[John Kane]

I don't know how to do it in plyr but 
xx  <-  seq(1:300)
nn  <- trunc( length(xx)/4)
yy  <-  xx[nn, ]

should come close.  Have a look at ?ceiling or ?floor as an alternative to trunc()

John Kane
Kingston ON Canada


> -----Original Message-----
> From: shivibhatia at ymail.com
> Sent: Thu, 13 Aug 2015 03:14:38 -0700 (PDT)
> To: r-help at r-project.org
> Subject: [R] Finding top 25% observations in Dplyr
> 
> Hi All, I am working on a dataset baseball where i am grouping based on
> one
> var income in descending order.
> Now i need to find the top 25% of the observations from the income group
> for
> which i used top_n (0.25) but it is not finding the desired.
> 
> Can you please suggest.
> 
> Baseball%>%
>   group_by(income)%>%  top_n(0.25,income)%>%
>   arrange(desc(income))
> 
> 
> 
> 
> 
> --
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> Sent from the R help mailing list archive at Nabble.com.
> 
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