R equivalent of python “_”?

问题:

Python has an identifier _ that allows for storing the result of the last evaluation which makes it great for speeding up data exploration and introspection.

In [1]: 43 * 2
Out[1]: 86

In [2]: _ + 1
Out[2]: 87

Is there a similar command in R?

回答1:

Tis a faff to type, but .Last.value:

> sqrt(2)
[1] 1.414214
> .Last.value
[1] 1.414214