Extended stats bucket aggregation
editExtended stats bucket aggregation
editA sibling pipeline aggregation which calculates a variety of stats across all bucket of a specified metric in a sibling aggregation. The specified metric must be numeric and the sibling aggregation must be a multi-bucket aggregation.
This aggregation provides a few more statistics (sum of squares, standard deviation, etc) compared to the stats_bucket
aggregation.
Syntax
editA extended_stats_bucket
aggregation looks like this in isolation:
{ "extended_stats_bucket": { "buckets_path": "the_sum" } }
Table 60. extended_stats_bucket
Parameters
Parameter Name | Description | Required | Default Value |
---|---|---|---|
|
The path to the buckets we wish to calculate stats for (see |
Required |
|
|
The policy to apply when gaps are found in the data (see Dealing with gaps in the data for more details) |
Optional |
|
|
DecimalFormat pattern for the
output value. If specified, the formatted value is returned in the aggregation’s
|
Optional |
|
|
The number of standard deviations above/below the mean to display |
Optional |
2 |
The following snippet calculates the extended stats for monthly sales
bucket:
response = client.search( index: 'sales', body: { size: 0, aggregations: { sales_per_month: { date_histogram: { field: 'date', calendar_interval: 'month' }, aggregations: { sales: { sum: { field: 'price' } } } }, stats_monthly_sales: { extended_stats_bucket: { buckets_path: 'sales_per_month>sales' } } } } ) puts response
POST /sales/_search { "size": 0, "aggs": { "sales_per_month": { "date_histogram": { "field": "date", "calendar_interval": "month" }, "aggs": { "sales": { "sum": { "field": "price" } } } }, "stats_monthly_sales": { "extended_stats_bucket": { "buckets_path": "sales_per_month>sales" } } } }
|
And the following may be the response:
{ "took": 11, "timed_out": false, "_shards": ..., "hits": ..., "aggregations": { "sales_per_month": { "buckets": [ { "key_as_string": "2015/01/01 00:00:00", "key": 1420070400000, "doc_count": 3, "sales": { "value": 550.0 } }, { "key_as_string": "2015/02/01 00:00:00", "key": 1422748800000, "doc_count": 2, "sales": { "value": 60.0 } }, { "key_as_string": "2015/03/01 00:00:00", "key": 1425168000000, "doc_count": 2, "sales": { "value": 375.0 } } ] }, "stats_monthly_sales": { "count": 3, "min": 60.0, "max": 550.0, "avg": 328.3333333333333, "sum": 985.0, "sum_of_squares": 446725.0, "variance": 41105.55555555556, "variance_population": 41105.55555555556, "variance_sampling": 61658.33333333334, "std_deviation": 202.74505063146563, "std_deviation_population": 202.74505063146563, "std_deviation_sampling": 248.3109609609156, "std_deviation_bounds": { "upper": 733.8234345962646, "lower": -77.15676792959795, "upper_population" : 733.8234345962646, "lower_population" : -77.15676792959795, "upper_sampling" : 824.9552552551645, "lower_sampling" : -168.28858858849787 } } } }