[R] NTH PERCENTILE COULMNWIESE
Rui Barradas
ruipbarradas at sapo.pt
Wed Jul 18 10:37:31 CEST 2012
Hello,
Try the following.
colQuant <- function(x, probs= seq(0, 1, 0.25), na.rm = FALSE,
names = TRUE, type = 7, ...){
apply(x, 2, quantile, probs = probs, na.rm = na.rm, names = names, type
= type, ...)
}
mat <- matrix(rnorm(12), 4)
colQuant(mat, 0.20)
colQuant(mat, c(0.20, 0.5))
Hope this helps,
Rui Barradas
Em 18-07-2012 08:06, Rantony escreveu:
> Hi,
>
> Here i have an matrix
> mydat <-
> ABC XYZ
> ----- ------
> 12 6
> 6 50
> 90 100
> 55 85
> 100 25
>
> i need to find the " NTH percentile " [result should be in column-wise].
> here i have a code for NTH percenile,
>
> For eg:- if i need 20th-percentile then,
> quantile(ncol(mydat),.2) - here i getting output for complete matrix ,But i
> need this for all the columnswise. like this,
>
> for nth percentile
> ABC XYZ
> ------ -------
> 20% 10 24 [here, given percentile value is not exact result, its
> just for output format]
>
> -Its urgent !
>
> - Thanks
> Antony.
>
>
> --
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>
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