I have a numeric vector of length 1. I am trying to use it inside a function just by giving its name, rather than specifying it as an argument to the function. I am aware that there is an attach function which you need to call. The attach function will accept a list. However, I don't seem to be able to create the list properly. (Or should I use a frame instead?)
Anyway, here is the output, starting with the load operation; ---------------------------------------------------------------------------- > # function bar_driver > > free_driver <- function (){ + i <- 25 + attach_list <- list (i = i) + print1 ("attach_list = ", attach_list) + attach (attach_list) + free_test () + + } > free_test <- function (){ + print ("entering free_test") + print1 ("i") + return () + + } > [1] "attach_list = " $i [1] 25 The following object(s) are masked _by_ .GlobalEnv : i [1] "entering free_test" [1] "i" Error in print(value) : argument "value" is missing, with no default > --------------------------------------------------------------------- >From Tom: Question 1: Is the idea of using such a variable viable at all? In some communities, it would be called a "free variable." Question 2: Is the list correct? If not, how does one build it correctly? Question 3: How do you tell it NOT to mask the variable i by .GlobalEnv, whatever that is? Your advice? Tom Jones Thomas L. Jones, PhD, Computer Science ______________________________________________ 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.