On Jun 30, 2015, at 6:04 AM, Peter Maclean via R-help wrote:
> Hi EverybodyI am trying to make an object with length(a) * length(b)
> element using a double loop. But I am getting the last part only. A simple
> script is
> a <- c("A-AA", "B-BB", "C-CC")
> b <- seq(1, 5)
> pre <- NULL
> post <- NULL
> page <- NULLfor(j in 1:length(a)) {
> for(i in 1:length(b)){
> pre[j] <- strsplit(a[j],"-")[[1]][1]
> post[j] <- strsplit(a[j],"-")[[1]][2]
> page[i] <- paste0(pre[j], b[i],post[j])
> }}Peter Maclean
> Department of Economics
> UDSM
> [[alternative HTML version deleted]]
If you don't want folks here to think you have difficulty with the English
language in the posting guide or with managing computer applications, you will
set your mail-client to plain-text for communications to r-help. Notice that
your code was a bit mangled by the HTML format. This is sometimes much more of
a problem than it was in this instance. You've been posting since 2011 so
really have no excuse for continuing to flout the mailing list norms:
> page <- paste( rep(a, length(b) ), rep(b, each =length(a) ) )
>
> page
[1] "A-AA 1" "B-BB 1" "C-CC 1" "A-AA 2" "B-BB 2" "C-CC 2" "A-AA 3"
[8] "B-BB 3" "C-CC 3" "A-AA 4" "B-BB 4" "C-CC 4" "A-AA 5" "B-BB 5"
[15] "C-CC 5"
>
> ______________________________________________
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> and provide commented, minimal, self-contained, reproducible code.
David Winsemius
Alameda, CA, USA
______________________________________________
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