Hello, I'm new to R and would like to know how to create a vector of "rolling sums". (I have seen the Rmetrics package and the rollMean function and I would like to do the same thing except Sum instead of Mean.) I imagine someone has done this, I just can't find it anywhere.
Example: x <- somevector #where x is 'n' entries long #what I would like to do is: x1 <- x[1:20] output1 <- sum(x1) x2 <- x[2:21] output2 <- sum(x2) x3 <- ... ouput <- c(output1, output2, ...) Thanks, JV -- View this message in context: http://www.nabble.com/rolling-sum-%28like-in-Rmetrics-package%29-tp15459848p15459848.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.
