[Question] Plotting null values in XYFrame

[bengarvey]

For the green and red lines in this chart, I don't have data prior to 1982, so those values are null in my dataset. Semiotic still plots them at the bottom of the y axis. I tried making the line formatting conditional to hide them, but that didn't seem to work.

Is this considered a bug or is there a way around it?

[emeeks]

You can use the defined attribute to set rules for when a value means a gap. So in your case you should be able to set:
defined={d => d.yourValue !== null}
If that doesn't work let me know. That will work for any gaps in the data.
Love the sketchy rendering in looks so hand-drawn.

[bengarvey]

💥

That worked perfecly, thanks.

[bengarvey]

@emeeks Upgraded to 1.16.3 and I think this is broken again.

With this code:
defined={d => d.yourValue !== null}

It seems to ignore the nulls completely instead of skipping them, making it span the data across the whole chart even where it shouldn't be. I fixed this by explicitly setting the xExtent, which solved the problem, but I figured I'd let you know this behavior changed. Feel free to close if this is intentional or not a big issue.

The problem explained visually:
With no xExtent set, but null values for earlier datapoints.

With explicit xExtent set, correctly not plotting the nulls.