Series with different intervals and 'series.connect=false' causes larger interval series to be hidden

[ciarancourtney]

I think it should be pretty clear whats going on here, I my case I'm comparing 60sec Vs 900sec interval data, so there is only a prop for the 900 series every 15 elements of data array, so I guess with series.connect = false the interpolation algorithm treats every edge as a gap.

Would it be helpful in terms of performance to set the expected interval on each series?

[martynasma]

I think what you're looking for is autoGapCount:

https://www.amcharts.com/docs/v4/chart-types/xy-chart/#Gaps_over_missing_data_points

[ciarancourtney]

I think what you're looking for is autoGapCount:

https://www.amcharts.com/docs/v4/chart-types/xy-chart/#Gaps_over_missing_data_points

No its a bug, each series should be treated distinctly when it comes to joining datapoints.

[martynasma]

autoGapCount is a series' property, so you can set it for each series individually what you consider a "gap".

[ciarancourtney]

Hi @martynasma I think the root issue is that XYSeries._baseInterval is maintained as the minimal interval e.g. if I add a 3600sec interval series gaps appear fine, if I add a 900sec interval the original gaps are broken as the baseInterval changed to 900sec. In order to set autoGapCount per series I'd need to parse and normalize the baseInterval to a fixed interval, which is an extremely hacky solution to something that should work out of the box.

I think the change is to:

• Determine a distinct interval property per XYSeries and maintain XYSeries._baseInterval as normal
  • It may to pertinent at this point to allow setting the base 'timeUnit' to a fixed unit, like seconds, does that make sense?
• Add option to set interval per series (great if this improves performance?)

I do have a use case for COV (Change of Value) Time Series in future, but right now my series is aligned to a fixed interval and I know it AOT

[martynasma]

Not sure if I get the issue. Are you saying you don't want or can't to set baseInterval for your series?

[ciarancourtney]

Not sure if I get the issue. Are you saying you don't want or can't to set baseInterval for your series?

@martynasma This should illustrate the issue https://stackblitz.com/edit/amcharts4-issue-1192

Note I added bullets so you can see the 3600sec interval datapoints when zooming in

Semi-related #321

[martynasma]

So basically, what you're saying is that we should maintain baseInterval per-series not per-axis. Right?

[ciarancourtney]

So basically, what you're saying is that we should maintain baseInterval per-series not per-axis. Right?

I'm not sure of the implementation, to me baseInterval suggests a common, minimum interval that all series can align to, and that each series has a native interval, in my case between 60s and 3600s . I think a mode where the interval of each series must be specified would be a good feature in terms of determinism and performance.

Is the stackblitz example clear? When you add the 3600s series after the 900s series, it doesn't appear i.e. 100% gaps

[martynasma]

It's clear.

Since auto-gaps are calculated based on DateAxis.baseInterval when you have only 3600 series, it is 3600s - no gaps.

When you add a series with more granular data, baseInterval becomes smaller, satisfying autoGapCount * baseInterval for each data point of 3600 series, hence no connections.

We'll need to discuss this if we can implement it without significant overhead.

[ciarancourtney]

Hi @martynasma do you have a plan to resolve this issue yet?

[martynasma]

Not yet, sorry.

[ciarancourtney]

@martynasma are you saying this is fixed?

[martynasma]

No, this was auto-closed. Sorry.

I'll bring it back up, and promoted to enhancement request, so that it is not auto-closed.