Rapid Automatic Keyword Extraction (RAKE).
rapidraker
A fast version of the Rapid Automatic Keyword Extraction (RAKE) algorithm
Installation
You can get the stable version on CRAN:
install.packages("rapidraker")
The development version of the package requires you to compile the latest Java source code in rapidrake-java, so installing it is not as simple as making a call to devtools::install_github()
.
What is rapidraker
?
rapidraker
is an R package that provides an implementation of the same keyword extraction algorihtm (RAKE) as slowraker
. However, rapidraker::rapidrake()
is written in Java, whereas slowraker::slowrake()
is written in R. This means that you can expect rapidrake()
to be considerably faster than slowrake()
.
Usage
rapidrake()
has the same arguments as slowrake()
, and both functions output the same type of object. You can therefore substitue rapidrake()
for slowraker()
without making any additional changes to your code.
library(slowraker)
library(rapidraker)
data("dog_pubs")
rakelist <- rapidrake(txt = dog_pubs$abstract[1:5])
rapidrake()
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 :22 ...
#> ..$ stem :"current dog suitabl assess focus" ...
#> #...With 3 more data frames.
You can bind these data frames together using slowaker::rbind_rakelist()
:
rakedf <- rbind_rakelist(rakelist, doc_id = dog_pubs$doi[1:5])
head(rakedf, 5)
#> doc_id keyword freq score stem
#> 1 10.1371/journal.pone.0132820 assistance dog identification tags 1 10.8 assist dog identif tag
#> 2 10.1371/journal.pone.0132820 animal control facilities 1 9.0 anim control facil
#> 3 10.1371/journal.pone.0132820 emotional support animals 1 9.0 emot support anim
#> 4 10.1371/journal.pone.0132820 small body sizes 1 9.0 small bodi size
#> 5 10.1371/journal.pone.0132820 seemingly inappropriate dogs 1 7.9 seem inappropri dog
Learning more
- To learn more about the API used by both
slowraker
andrapidraker
, head over toslowraker
’s webpage.