I want to make a visualization using Timelion.
I want to plot the count of documents only where a field is unique. In my case it is the user_id of the user.
How do I put the condition that some field should be unique in Timelion expression ?
Hello,
You can use the Cardinality metric for this.
.es(*, metric='cardinality:user_id')
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Thank you. It was helpful.
Can you please elaborate this cardinality thing ?
It's a term commonly used in SQL for counting the number of unique elements in a set.
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