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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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.
>
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/NTH-PERCENTILE-COULMNWIESE-tp4636839.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
Hi Try this: mydat <-read.table(text=" ABC??? XYZ 12????????? 6 6??????????? 50 90??????? 100 55????????? 85 100??????? 25 ",sep="",header=TRUE) apply(mydat,2,quantile,probs=0.2) ?ABC? XYZ 10.8 21.2 A.K. ----- Original Message ----- From: Rantony <antony.akkara at ge.com> To: r-help at r-project.org Cc: Sent: Wednesday, July 18, 2012 3:06 AM Subject: [R] NTH PERCENTILE COULMNWIESE 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. -- View this message in context: http://r.789695.n4.nabble.com/NTH-PERCENTILE-COULMNWIESE-tp4636839.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.