Executing a matrix stats aggregation

Elasticsearch 5.x provided a special module called aggs-matrix-stats that automatically computes advanced statistics on several fields.

Getting ready

You need an up-and-running Elasticsearch installation, as we described in the Downloading and installing Elasticsearch recipe in Chapter 2, Downloading and Setup.

To execute curl via the command line, you need to install curl for your operative system.

To correctly execute the following command, you need an index populated with the chapter_08/populate_aggregations.sh script available in the online code.

How to do it...

For executing a top hot aggregation, we will perform the following steps:

1. We want to evaluate statistics related to price and age in our knowledge base. We'll execute the search and aggregation with the following command:

           curl -XGET 'http://127.0.0.1:9200/test-index/test-type/_search? 
           size=0&pretty' -d ' 
           { 
               "query": { 
                   ...