How can I do scripted aggregation in Kibana + Elasticsearch? -

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let's have log of events of ad displays , ad clicks stored via logstash in elasticsearch , displayed in kibana 4. calculate simple metric ctr (click-through-rate) of events , :

ctr = #clicks/#displays.

first of all, know if it's possible in elasticsearch + kibana? don't see possibility in kibana. thinking doing in raw elasticsearch scripted aggregation. don't know how define such in kibana.

any ideas on how welcome! comments explaining it's impossible valuable.

kibana 4 includes support elasticsearch scripting. can go settings > indices (pick pattern) > scripted fields , add new scripted field computes ctr. take @ "scripted fields" @ elastic blog more info.


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