Your expression is trying to sum a character vector
containing the names of the variables that begin with ABC.
Try this and try executing each portion of it to understand
it better:
ABC1 <- ABC2 <- 1
do.call("sum", lapply(apropos(glob2rx("ABC*")), get)) # 2
On 2/20/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> Dear R users,
>
> Inspired by previous list discussion of the glob2rxc function, I am
> attempting to create a new vector called TOTAL by summing all vectors
> whose names begin with ABC:
>
> TOTAL = sum(list = ls(pattern = glob2rx("ABC*")))
>
> I'm running R 2.2.1 on Windows XP. Can anyone say what I'm missing?
>
> Thank you, Mark
>
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