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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