1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
# lazyeval
[](https://travis-ci.org/hadley/lazyeval)
[](http://codecov.io/github/hadley/lazyeval?branch=master)
The lazyeval package provides tools that make it easier to correctly implement non-standard evaluation (NSE) in R. You use lazy evaluation by requiring the user to "quote" specially evaluated arguments with `~`, and then using the lazyeval package to compute with those formulas. It is also possible to eliminate the use of the `~` by converting promises to formulas. This does make programming with such functions a little harder, but it can be worth it in certain situations. See `vignette("lazyeval")` for more details.
## Installation
Install the released version from CRAN with:
```R
install.packages("lazyeval")
```
Install the development version from github with:
```R
# install.packages("devtools")
devtools::install_github("hadley/lazyeval", build_vignettes = TRUE)
```
|
