Hi: Try
sapply(1:length(x), function(y) prod(x[y:length(x)])) HTH, Dennis On Sat, May 7, 2011 at 9:37 AM, pwldk <pw...@hotmail.com> wrote: > i simply want a set of numbers in a vector which: > in the vector v, i want the numbers be (x[1]*x[2]*....*x[100], > x[2]*x[3]*...*x[100], x[3]*x[4]*...*x[100],...,x[98]*x[99]*x[100], > x[99]*x[100],x[100]) > so there should be 100 elements in the vector. > here's how i do it > x=rnorm(100,0.5,0.2) > v=prod(x[(1:100):100]) > but it turns out failed as it says there are 100 elements in the expression, > but only the first one has been used > > anyone help me how do i get the number i want? > thanks soooo much!! > > > -- > View this message in context: > http://r.789695.n4.nabble.com/help-warning-only-the-first-element-has-been-used-tp3505837p3505837.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@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. > ______________________________________________ R-help@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.
