# Average for a string field in Kibana visualization

**URL:** <https://discuss.elastic.co/t/average-for-a-string-field-in-kibana-visualization/299819>\
**Category:** Kibana\
**Created:** [March 16, 2022, 6:21am UTC](https://discuss.elastic.co/t/average-for-a-string-field-in-kibana-visualization/299819 "2022-03-16T06:21:30Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Sandeep\_Raju](https://avatars.discourse-cdn.com/v4/letter/s/8797f3/32.png) [@Sandeep\_Raju](https://discuss.elastic.co/u/Sandeep_Raju)\
**Post date:** [March 16, 2022, 6:21am UTC](https://discuss.elastic.co/t/average-for-a-string-field-in-kibana-visualization/299819/1 "2022-03-16T06:21:30Z")

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Hi all,

I'm trying to find average for a string field and I want to show in a bar chart in Kibana by date.

In my dataset, Say I have hundreds of computers with a `computer_id` ( string field).  
I have hundreds of Virus attacks in my computers with `virus_attack_id`( string field).

I can project just sum of virus attacks in all my systems in bar chart.

How do i display average virus attacks i.e count of virus attacks / number of computers as both my fields are string fields?

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<div class="post-metadata">

**Author:** ![Marco\_Liberati](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marco_liberati/32/82953_2.png) [@Marco\_Liberati](https://discuss.elastic.co/u/Marco_Liberati)\
**Post date:** [March 16, 2022, 11:49am UTC](https://discuss.elastic.co/t/average-for-a-string-field-in-kibana-visualization/299819/2 "2022-03-16T11:49:34Z")

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Hi @Sandeep_Raju ,

have you tried already to build a `Metric` visualization in Lens with a formula like:

```auto
count(kql='virus_attack_id: *') / count(kql='computer_id: *')

```

It is also possible to set the Percentage format to have a ratio of computer infected:

 ![Screenshot 2022-03-16 at 12.47.42](https://us1.discourse-cdn.com/elastic/original/3X/1/d/1d44c8ed34024066e9cb0b42c03d5f297c97fb16.png)

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<div class="post-metadata">

**Author:** ![Sandeep\_Raju](https://avatars.discourse-cdn.com/v4/letter/s/8797f3/32.png) [@Sandeep\_Raju](https://discuss.elastic.co/u/Sandeep_Raju)\
**Post date:** [March 17, 2022, 6:37am UTC](https://discuss.elastic.co/t/average-for-a-string-field-in-kibana-visualization/299819/3 "2022-03-17T06:37:45Z")

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Thank you. Yes, It works in lens.

Another way I found out is by using TSVB  
Then take count of both terms.

THen take Bucket script and use formula like above.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [April 14, 2022, 6:38am UTC](https://discuss.elastic.co/t/average-for-a-string-field-in-kibana-visualization/299819/4 "2022-04-14T06:38:07Z")

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