returning quartiles of a list?
Thomas Lumley writes:
Hi, all. I have a list: process <- c( 5 , 7 , 4 , 1 , 4 , 1) and I'd like to get each half (or each third or each quartile) of the list:
n<-length(process) process[1:(n/2)] process[(n/2):1] process[(n/4):(n/2)] etc, etc,
Hmmm... I tried this first and it only works for even lists
process <- c( 5 , 7 , 4 , 1 , 4 , 1) n<-length(process) n
[1] 6
process[1:(n/2)]
[1] 5 7 4 (works fine)
process[(n/2):1]
[1] 4 7 5 (this is just a reverse of the previous)
process[(n/2):n]
[1] 4 1 4 1 (this double counts the first 4, of course)
process[((n/2)+1):n]
[1] 1 4 1 (but this works for even lists)
process[(n/4):(n/2)]
[1] 5 7 (works)
process <- c( 5 , 7 , 4 , 1 , 4 , 1, 8)
(and this is now an odd list)
process[1:(n/2)]
[1] 5 7 4 (works fine)
process[((n/2)+1):n]
[1] 1 4 1 (but the bit that worked for the even lists above doesn't work here (and I don't quite understand why not...) thanks! greg -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._