Y-axis automatic scaling not working on Log for values <1

[th0ger]

When plotting a linechart with logarithmic y-axis, the automatic scaling of the y-axis does not work for the lower (Min) bound if some values are < 1:

The Min bound is incorrectly fixed to 1 (in my example it should have been around 0.03).

Below I have Set axis extent to Min=0.01 to show you the full dataset below 1:

Kibana version: 7.9.1

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[flash1293]

@nickofthyme will this be fixed with the elastic-charts migration as well?

[nickofthyme]

Yes this is fixed with elastic-charts implementation. Though we need to refine the axis tick label spacing (elastic/elastic-charts#915).

[th0ger]

@nickofthyme sounds good, but your screenshot shows "Set axis extent" enabled. The bug occurs when this is disabled. Can you provide a screenshot for that as well?

[nickofthyme]

@th0ger thank you for clarifying, I totally read that wrong. Unfortunately, it looks to function the same way. I will look into this and see what is causing this.

[nickofthyme]

@th0ger this feature will be added in 7.13. Unfortunately, I was not able to get this into 7.12. The required changes within our charting library can be found here elastic/elastic-charts#1032. I'll open a PR with the kibana implementation and tag this issue.

[nickofthyme]

Hey @th0ger another update on this. I had some pushback on #93352 questioning adding more options to the config. We are discussing a fix where 1 will be used unless your data goes below 1 in which case the domain will be extended to include that data. This should roll out in 7.14, sorry for the delay on this.

[stratoula]

@nickofthyme can we close this?

[nickofthyme]

I don't believe so, I don't know why this work was paused. We added the logMinLimit property in charts and #93352 would have added this option to the kibana vis editor but was decided against and never merged.

Currently there is no use of logMinLimit across all of kibana and the auto min described in elastic/elastic-charts#1257 has not been implemented so the functionality described in this issue is unchanged as of today.

So I'd say keep it open until we close elastic/elastic-charts#1257.

[markov00]

In order to provide better transparency of priorities, issues that will not be prioritized within the next 24 months are being closed.

Tracking request in Lens general improvements ice box #184459