Suppose I have a vector that is nested in a dataframe with one or two levels. Is there a quick and dirty way to access the last value, without using the length() function? Something ala PERL's $# special var?

So I would like something like:

dat$vec1$vec2[$#]

instead of:

dat$vec1$vec2[length(dat$vec1$vec2)]
r dataframe vector
Edit
Report