On 8/15/05, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > Dear R wizards: > > under R-2.1.0: > > eargs <- 3:5; > line <- paste(c("echo A B", eargs)); > cat("executing from R: '", line, "'\n"); > system(line); > > Oddly, only "A" and "B" are echoed, not the eargs. I had hoped that > line would be one string at this point, and for printing this seems to > be true. However, unlist(line) still gives me the 4 components. It > almost seems like the objects were not really pasted, but kept separate > [perhaps to conserve memory]---which works internally, but not > externally. > > Is this my poor understanding of R, an R "feature," or an R bug?
Poor understanding but the mistake is a common one. If you want to form a character vector of length 1 you must use the "collapse" argument to paste(). Try > eargs <- 3:5 > paste("echo A B", paste(eargs, collapse = " ")) [1] "echo A B 3 4 5" > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html