Kibana histogram - drawing multiple series on a single chart

Question

I have an index in Elasticsearch which contains an array of simple objects (key-value please see example below).

The documents have a timestamp.

I can creat

Answer 1

It can be done using a newer panel called "multifieldhistogram". I could use it in Kibana3 after a Kibana patch got installed recently.

Please see this link which shows the panel. https://code.csdn.net/chenryn/kibana.