I can't reproduce that. When I run it I get no warning. Check your versions:
> Lines <- "1946 4 1.27 + 1946 5 1.27 + 1946 6 1.27 + 1946 7 1.27 + 1946 8 1.52 + 1946 9 1.52 + 1946 10 1.52 + 1946 11 1.52 + 1946 12 1.62 + 1947 1 1.62 + 1947 2 1.62 + 1947 3 1.62 + 1947 4 1.87 + 1947 5 1.87 + 1947 6 1.87" > res <- read.table(textConnection(Lines)) > library(zoo) Warning message: closing unused connection 3 (Lines) > as.yearmon(paste(res[, 1], res[, 2], sep = "-")) [1] "Apr 1946" "May 1946" "Jun 1946" "Jul 1946" "Aug 1946" "Sep 1946" [7] "Oct 1946" "Nov 1946" "Dec 1946" "Jan 1947" "Feb 1947" "Mar 1947" [13] "Apr 1947" "May 1947" "Jun 1947" > > R.version.string # Windows Vista [1] "R version 2.7.2 (2008-08-25)" > packageDescription("zoo")$Version [1] "1.5-4" On Wed, Sep 10, 2008 at 2:15 PM, Megh Dal <[EMAIL PROTECTED]> wrote: > I have following dataset: > >> res > [,1] [,2] [,3] > [1,] 1946 4 1.27 > [2,] 1946 5 1.27 > [3,] 1946 6 1.27 > [4,] 1946 7 1.27 > [5,] 1946 8 1.52 > [6,] 1946 9 1.52 > [7,] 1946 10 1.52 > [8,] 1946 11 1.52 > [9,] 1946 12 1.62 > [10,] 1947 1 1.62 > [11,] 1947 2 1.62 > [12,] 1947 3 1.62 > [13,] 1947 4 1.87 > [14,] 1947 5 1.87 > [15,] 1947 6 1.87 > > Now I write following code : > >> as.yearmon(paste(res[,1], res[,2], sep="-")) > [1] "Apr 1946" "May 1946" "Jun 1946" "Jul 1946" "Aug 1946" "Sep 1946" "Oct > 1946" "Nov 1946" "Dec 1946" > [10] "Jan 1947" "Feb 1947" "Mar 1947" "Apr 1947" "May 1947" "Jun 1947" > Warning message: > In if (nch == 1) "%Y-%m" else "%Y-%m-%d" : > the condition has length > 1 and only the first element will be used > > Can anyone please tell me why this warning message is coming and what is the > remedy? > > Regards, > > ______________________________________________ > 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.