[R] how to use conditional statements to handle exceptions?

[Andy Bunn]

If you mean to put a check in to see if the file exists then something
like this would work:

  for(i in 1:3){
    aFile <- paste("file", i, ".dat", sep = "")
    if(file.exists(aFile) == T){
        bb <- read.table(aFile, header = F)
        x11()
        plot(bb)
        dev.off()
    }
  }


If you mean that you want to check to see that it has data in it you
could ammend the if statement to something like 

if(nrow(aFile) > 0)...


HTH, Andy