Dear kind list people: I have the following code: >hours [1] "0" "1" "2" "4" "5" "6" "7" "8" "9" "10" "11" "12" "13" "14" "15" [16] "16" "17" "18" "19" "20" "21" "22" "23" > alist $`0` [1] 3 10 10 6 5 6 4 8 9 3 7 5 8 3 6 7 2 6 6 1 4 8 10 4 10 [26] 13 6 2 8 4 7 3 4 7 9 6 4 7 4 4 4 3
$`1` [1] 1 1 3 2 3 4 2 1 $`2` [1] 1 1 3 3 . . . mn=c(length(alist)*1000) il=c(length(alist)*1000) # Now calculate the means for(i in 1:length(alist)) { for(j in 1:1000) {mn[i*j]=mean(sample(alist[[i]], 1000, replace=TRUE)); il[i*j]= hours[i]}} But not even the il vector is correct: >il [1] "0" "1" "2" "4" "5" "6" "7" "8" "9" "10" "11" "12" "13" "14" [15] "15" "16" "17" "18" "19" "20" "21" "22" "23" "12" "5" "13" "9" "14" [29] "0" "15" "0" "16" "11" "17" "7" "18" "0" "19" "13" "20" "0" "21" [43] "0" "22" "15" "23" "0" "16" "7" "10" "17" "13" "0" "18" "11" "14" [57] "19" "1" "0" "20" "0" "1" "21" "16" "13" "22" "0" "17" "23" "14" [71] "0" "18" "0" "1" "15" "19" "11" "13" "0" "20" "9" "1" "0" "21" . . . and after a while, both mn and il get lots of NAs. The first 1000 entries should be "0". What am I doing wrong? And is there a way to do this without the two for loops? Thanks, Jim Rome ______________________________________________ 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.