Message-ID: <1387036396.93461.YahooMailNeo@web142602.mail.bf1.yahoo.com>
Date: 2013-12-14T15:53:16Z
From: arun
Subject: iterated sum
In-Reply-To: <tencent_4EACA09A7136C89765BAF0BB@qq.com>
Hi,
Try:
?x[-1]+x[-length(x)]
A.K.
On Saturday, December 14, 2013 5:46 AM, ???? <1248283536 at qq.com> wrote:
x<-c(1,4,9,20,3,7)
i want to get a serie c(5,13,29,23,10).
y <- c()
for (i in 2:length(x)){
? ? y[i-1] <- x[i-1]+x[i]}
is there more simple way to get?
??? [[alternative HTML version deleted]]
______________________________________________
R-help at 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.