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slowraker

A slow version of the Rapid Automatic Keyword Extraction (RAKE) algorithm

Linux Build Status AppVeyor Build Status

Installation

You can get the stable version from CRAN:

install.packages("slowraker")

Or the development version from GitHub:

if (!require(devtools)) install.packages("devtools")

devtools::install_github("crew102/slowraker")

Basic usage

There is one main function in the slowraker package - slowrake(). slowrake() extracts keywords from a vector of documents using the RAKE algorithm. This algorithm doesn’t require any training data, so it’s super easy to use:

library(slowraker)

data("dog_pubs")
rakelist <- slowrake(txt = dog_pubs$abstract[1:5])
#> Warning: package 'slowraker' was built under R version 3.4.2

slowrake() outputs a list of data frames. Each data frame contains the keywords that were extracted for an element of txt:

rakelist
#> 
#> # A rakelist containing 5 data frames:
#>  $ :'data.frame':    61 obs. of  4 variables:
#>   ..$ keyword:"assistance dog identification tags" ...
#>   ..$ freq   :1 1 ...
#>   ..$ score  :11 ...
#>   ..$ stem   :"assist dog identif tag" ...
#>  $ :'data.frame':    90 obs. of  4 variables:
#>   ..$ keyword:"current dog suitability assessments focus" ...
#>   ..$ freq   :1 1 ...
#>   ..$ score  :21 ...
#>   ..$ stem   :"current dog suitabl assess focu" ...
#> #...With 3 more data frames.

You can bind these data frames together using rbind_rakelist():

rakedf <- rbind_rakelist(rakelist = rakelist, doc_id = dog_pubs$doi[1:5])
head(rakedf, 5)
#>                         doc_id                            keyword freq score
#> 1 10.1371/journal.pone.0132820 assistance dog identification tags    1  10.8
#> 2 10.1371/journal.pone.0132820          animal control facilities    1   9.0
#> 3 10.1371/journal.pone.0132820          emotional support animals    1   9.0
#> 4 10.1371/journal.pone.0132820                   small body sizes    1   9.0
#> 5 10.1371/journal.pone.0132820       seemingly inappropriate dogs    1   7.9
#>                       stem
#> 1   assist dog identif tag
#> 2       anim control facil
#> 3        emot support anim
#> 4          small bodi size
#> 5 seemingli inappropri dog

Learning more

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.