https://github.com/s-fleck/lest

Vectorised Nested if-else Statements Similar to SQL CASE WHEN (forked from dplyr)
https://github.com/s-fleck/lest

dplyr ifelse r recoding

Last synced: about 2 months ago
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Vectorised Nested if-else Statements Similar to SQL CASE WHEN (forked from dplyr)

• Host: GitHub
• URL: https://github.com/s-fleck/lest
• Owner: s-fleck
• License: other
• Created: 2018-08-06T05:26:32.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2024-02-09T08:47:38.000Z (12 months ago)
• Last Synced: 2024-12-01T12:47:17.465Z (about 2 months ago)
• Topics: dplyr, ifelse, r, recoding
• Language: R
• Homepage: https://s-fleck.github.io/lest/
• Size: 69.3 KB
• Stars: 24
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
**This package is obsolete as dplyr has saner dependencies now, and data.table also implemented a similar function**

# lest

[![CRAN status](https://www.r-pkg.org/badges/version/lest)](https://cran.r-project.org/package=lest)

[![lifecycle](https://img.shields.io/badge/lifecycle-stable-brightgreen.svg)](https://www.tidyverse.org/lifecycle/#stable)

[![Travis build status](https://travis-ci.org/s-fleck/lest.svg?branch=master)](https://travis-ci.org/s-fleck/lest)

Lest provides two functions for vectorised conditional recoding of variables.

`case_when()` enables you to vectorise multiple `if` and `else` statements (like

`CASE WHEN` in SQL). `if_else()` is a stricter and more predictable version of

`base::ifelse()` that preserves attributes (and therefore works with Dates). The

functions in lest are forks of the

[dplyr](https://CRAN.R-project.org/package=dplyr) functions of

the same name. For more infos please refer to the [documentation](https://s-fleck.github.io/lest/).

Why use lest?

----------------------------------

Use this package if you like the semantics of `dplyr::case_when()`, but do not 

want to use dplyr because of the dependencies it comes with. 

**If you already use dplyr in your project, you gain no advantage from lest**. 

`lest::case_when()` and `lest::if_else()` behave exactly identical to 

the dplyr equivalents, just that they do not support tidyeval syntax 

(like `!!!`).

Dependencies

----------------------------------

**lest** depends only on base R, and will never add any external dependencies.

Installation

------------

You can install lest from GitHub with:

``` r

# install.packages("devtools")

devtools::install_github("s-fleck/lest")

```

Example

-------

``` r

x <- 1:50

case_when(

  x %% 35 == 0 ~ "fizz buzz",

  x %% 5 == 0 ~ "fizz",

  x %% 7 == 0 ~ "buzz",

  TRUE ~ as.character(x)

)

case_when(

  x %% 35 == 0 ~ 35,

  x %% 5 == 0 ~ 5,

  x %% 7 == 0 ~ 7,

  TRUE ~ NA

)

```