Line disappears when there are relatively few datapoints

[newinnovations]

This is related to my question #817.

I have a strange situation when I have few data points in relation to the wind data. When there is enough data things work ok:

When I zoom in and the wind data has much more data points than the main data, the line disappears:

Without the wind data the line shows fine:

Switch to dots instead of line also works:

Might this be a configuration issue?

[leeoniya]

what does your dataset look like? are you using uPlot.join()?

[newinnovations]

I combine the different data streams to have a common time base by inserting nulls. Then I give the data to uPlot:

const combined = combineSensorData(data, wind);
plot.setData(combined);

Dataset: [ [timestamps], [sensor-data], [wind-speed], [wind-dir] ]

combined.zip

[leeoniya]

you should insert undefined ;)

null is an explicit gap, whereas undefined is an alignment artifact. this is what uPlot.join() does, and my recommendation is to use that.