https://github.com/kwstat/lookup

Functions Similar to VLOOKUP in Excel
https://github.com/kwstat/lookup

Last synced: about 1 month ago
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Functions Similar to VLOOKUP in Excel

• Host: GitHub
• URL: https://github.com/kwstat/lookup
• Owner: kwstat
• License: other
• Created: 2021-04-12T16:03:36.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2024-07-17T12:13:53.000Z (5 months ago)
• Last Synced: 2024-10-13T15:42:38.185Z (about 2 months ago)
• Language: R
• Homepage: https://kwstat.github.io/lookup/
• Size: 1.16 MB
• Stars: 3
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: NEWS.md
  • License: LICENSE

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• jimsghstars - kwstat/lookup - Functions Similar to VLOOKUP in Excel (R)

README

        
# lookup 

[![CRAN_Status_Badge](http://www.r-pkg.org/badges/version/lookup)](https://cran.r-project.org/package=lookup)

[![CRAN_Downloads](https://cranlogs.r-pkg.org/badges/lookup)](https://cranlogs.r-pkg.org/badges/lookup)

Homepage: https://kwstat.github.io/lookup

Repository: https://github.com/kwstat/lookup

## Key features

The `merge()` function works great to combine dataframes. Until it returns more rows than expected. Or more columns than expected. Or more rows and columns than expected. The `match()` function can be used, but it is convoluted.

This package provides two simple functions:

* `vlookup()` is similar to Excel's `VLOOKUP`

* `lookup(x,key,value)` is a more sequential-thinking version of `match()`. Look for `x` in `key` and return the same position element from `value`. 

Both functions return a vector that is the same length as the input.

## Installation

```R

# Install the released version from CRAN:

install.packages("lookup")

# Install the development version from GitHub:

install.packages("devtools")

devtools::install_github("kwstat/lookup")

```

## Usage

```R

library(lookup)

dat = as.data.frame(state.x77)

dat$statename = rownames(dat)

lookup(state.name[1:5], dat$statename, dat$Frost)

#  [1]  20 152  15  65  20

vlookup(state.name[1:5], dat, "statename", "Frost")

#  [1]  20 152  15  65  20

```