[R-sig-Geo] large datasets processing improving?

[Alexander Arpaci]

Hi List

maybe not an truly geo like question 
but an R question I want to calculate percentiles which are ranked by comparing daily values percentiles with the overall distribution percentiles
I have data 1700 files with daily values  from 1960 so about 18000 values/days 
I use the following code which does what I want but it takes about 10 -15 minutes per file...
for (i in 1:17886) {
d1$perc[i] <- length(d1$normFMI[d1$normFMI

MSc. Alexander Arpaci
Assistant researcher

Department of Forest - and Soil Sciences
Institute of Silviculture
Tel. +43-1-47654-4081
e-mail: alexander.arpaci at boku.ac.at
www.wabo.boku.ac.at