Saving the last thing done as an object?

Question

I have a vector x <- rnorm(100) and whilst exploring my data I do:

x

Now I want to look at the mean of x, for which I could do:

mean(x)

But lets say instead I want to have a function last() which pulls in the last thing done in Rs history and saves it as an object, which would enable me to do:

mean(last())

I'd like to write a last() function if it doesn't already exist. But I cannot find a way to access (without saving and then reading back in) the history in any useful way via history().

Am I missing something?

Answer 1

You can get this working using .Last.value:

lv <- function() .Last.value
x = runif(100)
mean(lv())

I would be ok with using this in interactive mode, but using this in normal mode would make the code hard to read imo. So use at your own discretion.