On Oct 31, 2010, at 8:35 PM, Changbin Du wrote:
HI, Dear R community,
I have the following codes to calculate the commulative coverage.
Not sure exactly what you mean by this. My guess is implemented below.
I want to
save the output in a vector, How to do this?
test<-seq(10, 342, by=2)
#cover is a vector
cover_per<-function (cover) {
for (i in min(cover):max(cover))
Using either for (i in cover) { ...} or for (i in seq_along(cover) )
{...} would be more typical.
{print(100*sum(ifelse(cover >= i, 1,
0))/length(cover))}
}
result<-cover_per(test)
Are you looking for cumsum?
> test<-seq(10, 34, by=2)
> 100*cumsum(test)/sum(test)
[1] 3.496503 7.692308 12.587413 18.181818 24.475524
31.468531 39.160839
[8] 47.552448 56.643357 66.433566 76.923077 88.111888 100.000000
> print(100*cumsum(test)/sum(test), digits=2)
[1] 3.5 7.7 12.6 18.2 24.5 31.5 39.2 47.6 56.6 66.4
76.9 88.1 100.0
--
David Winsemius, MD
West Hartford, CT
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