Hi, try this: unlist(lapply(split(test,((seq_along(test)-1)%/% 10)+1),mean)) # 1 2 3 4 5 6 7 8 #0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.146375 # 9 10 11 #0.000000 0.194500 0.000000
A.K. ----- Original Message ----- From: Wim Kreinen <wkrei...@gmail.com> To: r-help <r-help@r-project.org> Cc: Sent: Tuesday, January 22, 2013 6:09 PM Subject: [R] summarise subsets of a vector Hello, I have vector called test. And now I wish to measure the mean of the first 10 number, the second 10 numbers etc How does it work? Thanks Wim > dput (test) c(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.71, 0.21875, 0, 0.27375, 0.26125, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.84125, 0.0575, 0.92625, 0.12, 0, 0) [[alternative HTML version deleted]] ______________________________________________ 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.
