Note: This is some prototype or example code for working with ElasticSearch from within R. It uses a REST and JSON interface.

RElasticSearch is an R library for reading data from an ElasticSearch index.

install.packages('devtools')
library(devtools)
install_git('git://github.com/duncantl/RElasticSearch.git')
library(RElasticSearch)

The following assumes an ElasticSearch index running at localhost:9200 and with an index called documents containing etnries with a title and text.

Create a server:

es.server <- new('ElasticSearchServer', host='localhost', port=9200L)

Next create an index:

es.index <- new('ElasticSearchIndex', server=es.server, index='documents')

Let's perform a keyword match on the titles:

query(es.index, text=list(query_text='keyword'))

Finally, let's do a query search on the text:

query(es.index, query_string=list(default_field='text', query='this AND that'))

That's it!