[Lens] Quickfunction help

[flash1293]

Adds help popover for quickfunctions:

For every function list, the popover shows the functions which are available as well.

Full list of descriptions:

Function	Description
Average	The Average of a field. This function only works for number fields.
Count	Total number of documents. When you provide a field, the total number of field values is counted. Use the count function for fields that have multiple values in a single document.
Counter rate	The change rate over time of an ever growing time series metric.
Cumulative sum	The sum of all values as they grow over time.
Differences	The change, or difference, between the values in subsequent intervals.
Last value	The value of a field from the last document, ordered by the default time field of the data view.
Maximum	The Maximum of a field. This function only works for number fields.
Median	The Median of a field. This function only works for number fields.
Minimum	The Minimum of a field. This function only works for number fields.
Moving average	Smoothing values over time by averaging a moving window of averages.
Percentile	The specified percentile of the values of a field. This is the value n percent of the values occuring in documents are smaller.
Percentile rank	The percentage of values which are below a certain value. For example, if a value is greater than or equal to 95% of the observed values it is said to be at the 95th percentile rank.
Standard deviation	The Standard deviation of a field. This function only works for number fields.
Sum	The Sum of a field. This function only works for number fields.
Unique count	The number of unique values of a specified field. Works for number, string, date and boolean values.
Date histogram	Date or date range values distributed into intervals.
Filters	Divides values into predefined subsets.
Intervals	Buckets values along defined numeric ranges.
Top values	The top values of a specified field ranked by the chosen metric.

[elasticmachine]

Pinging @elastic/kibana-vis-editors @elastic/kibana-vis-editors-external (Team:VisEditors)

[dej611]

Tested locally in Safari.

The feature works. Do you think it makes sense add a tooltip to the icon as done in the Formula panel?

[flash1293]

Good suggestion @mbondyra , I'm not sure about all the descriptions. Some of them are from the original spacetime PR, some of them I came up with on the spot because they were missing. @KOTungseth could you take a look too?

[KOTungseth]

Thank you so much for opening this PR! Here are my recommended changes.

Function	Description	Recommended change
Average	The Average of a field. This function only works for number fields.	The average value of a number field.
Count	Total number of documents. When you provide a field, the total number of field values is counted. Use the count function for fields that have multiple values in a single document.	The total number of documents. When you provide a field, the total number of field values is counted. Use the count function for fields that have multiple values in a single document.
Counter rate	The change rate over time of an ever growing time series metric.	The rate of change over time for an ever growing time series metric.
Cumulative sum	The sum of all values as they grow over time.
Differences	The change, or difference, between the values in subsequent intervals.
Last value	The value of a field from the last document, ordered by the default time field of the data view.
Maximum	The Maximum of a field. This function only works for number fields.	The maximum value of a number field.
Median	The Median of a field. This function only works for number fields.	The median value of a number field.
Minimum	The Minimum of a field. This function only works for number fields.	The minimum value of a number field.
Moving average	Smoothing values over time by averaging a moving window of averages.	The average of a moving window of average values over time.
Percentile	The specified percentile of the values of a field. This is the value n percent of the values occuring in documents are smaller.	The value n percent of the values that occur in smaller documents.
Percentile rank	The percentage of values which are below a certain value. For example, if a value is greater than or equal to 95% of the observed values it is said to be at the 95th percentile rank.	The percentage of values that are below a specific value. For example, when a value is greater than or equal to 95% of the calculated values, the value is the 95th percentile rank.
Standard deviation	The Standard deviation of a field. This function only works for number fields.	The amount of variation for a set of number fields.
Sum	The Sum of a field. This function only works for number fields.	The total amount of a set of number fields.
Unique count	The number of unique values of a specified field. Works for number, string, date and boolean values.	The number of unique values for a specified number, string, date, or boolean field.
Date histogram	Date or date range values distributed into intervals.	The date or date range values distributed into intervals.
Filters	Divides values into predefined subsets.
Intervals	Buckets values along defined numeric ranges.
Top values	The top values of a specified field ranked by the chosen metric.

[mbondyra]

I'd still change The change, or difference, between the values in subsequent intervals. to The change between the values in subsequent intervals. but apart from it looks fine.

[mbondyra]

@elasticmachine merge upstream

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 130d051

Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
lens	1.3MB	1.3MB	+5.3KB

History

• 💚 Build #76353 succeeded 885355f
• 💛 Build #75935 was flaky 213c103
• 💚 Build #75508 succeeded 55667ce
• 💚 Build #74829 succeeded c62f313

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[MichaelMarcialis]

@flash1293: I'm a little late to the party on this one, but is there any chance we could switch the EuiButtonIcon placement so that it appears on the right side of the text? It feels a little weird currently to have it appear before the "Functions" label text.

[flash1293]

No problem, opened a PR for this: #142623

[TinaHeiligers]

for auditing purposes, I referenced this issue in a bug-fix by mistake.