[R] Retrieving locations of element of a vector or matrix

Henrique Dallazuanna wwwhsd at gmail.com
Mon Mar 31 16:30:01 CEST 2008


For the position use order indeed of sort

On 31/03/2008, Henrique Dallazuanna <wwwhsd at gmail.com> wrote:
> I think that you can use:
>
>  x <- sample(1:20, 10)
>  head(sort(x), 5) #First 5 minimum values
>  head(sort(x, decreasing = TRUE), 5) #First 5 maximum values
>
>
>  On 31/03/2008, Yemi Oyeyemi <gmoyeyemi at yahoo.com> wrote:
>  > Hello all,
>  >   I have a problem of getting the locations of elements in a vector or matrix. I know one can use the command "which.min" or which.max" to get the location of minimum or maximum values in a vector. But is there any command to get the first k minimum values or maximum values in a vector.
>  >   Thanks
>  >
>  >
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>
> --
>  Henrique Dallazuanna
>  Curitiba-Paraná-Brasil
>  25° 25' 40" S 49° 16' 22" O
>


-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O



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