Search field statistics
Search field statistics
field_stats( conn, fields = NULL, index = NULL, level = "cluster", body = list(), raw = FALSE, asdf = FALSE, ... )
conn |
an Elasticsearch connection object, see |
fields |
A list of fields to compute stats for. optional |
index |
Index name, one or more |
level |
Defines if field stats should be returned on a per index level or on a cluster wide level. Valid values are 'indices' and 'cluster' (default) |
body |
Query, either a list or json |
raw |
(logical) Get raw JSON back or not |
asdf |
(logical) If |
... |
Curl args passed on to crul::HttpClient |
The field stats api allows you to get statistical properties of a field without executing a search, but looking up measurements that are natively available in the Lucene index. This can be useful to explore a dataset which you don't know much about. For example, this allows creating a histogram aggregation with meaningful intervals based on the min/max range of values.
The field stats api by defaults executes on all indices, but can execute on specific indices too.
Deprecated in Elasticsearch versions equal to/greater than 5.4.0
## Not run:
x <- connect()
if (gsub("\\.", "", x$ping()$version$number) < 500) {
field_stats(x, body = '{ "fields": ["speaker"] }', index = "shakespeare")
ff <- c("scientificName", "continent", "decimalLatitude", "play_name",
"speech_number")
field_stats(x, "play_name")
field_stats(x, "play_name", level = "cluster")
field_stats(x, ff, level = "indices")
field_stats(x, ff)
field_stats(x, ff, index = c("gbif", "shakespeare"))
# can also pass a body, just as with Search()
# field_stats(x, body = list(fields = "rating")) # doesn't work
field_stats(x, body = '{ "fields": ["scientificName"] }', index = "gbif")
body <- '{
"fields" : ["scientificName", "decimalLatitude"]
}'
field_stats(x, body = body, level = "indices", index = "gbif")
}
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.