How to assign the result of the previous expression to a variable?

Question

Suppose I'm using R's interactive console, and I've just done something like this:

long_running_command()

That long-running command returns a value, and I've just realized that I wanted to assign that value to a variable instead of discard it. So how can I get that value without running the command again? Is there a command like this?

result = get_last_return_value()

Solution

.Last.value is an answer.

It was answered once but you have better title.

Comments

[Daniel Que]

Is there a more concise expression for this, or a way to configure one?

[Ryan C. Thompson]

lv <- function() .Last.value. Then use lv() to get the last value.

[Paul FREAKN Baker]

I like the use of this lambda, but I used ans instead of lv so I could mimic my TI calculator.

[Martin Ueding]

One could type .La and hit the Tab key, that would also work.

[lmo]

As a side note, rstudio users can see this value in their environment panel by going to Global options > General and then clicking on the box labelled "Show .Last.value."

[stevec]

.Last.value is very cool. Out of interest. Is there a short hand way to call it? I know ruby has the incredibly succinct _, which does the same as .Last.value in one character! - extremely convenient. Is there any short hand for .Last.value ?