How to represent a null value，It's like the picture? not 0

[guoyutao]

[HudsonGraeme]

If you're working in Swift, and you encounter a nil value, then add error trapping to still add a nil value; something like the following would maybe work
if(temperature == nil) { temperature =0 } else { //Add to to chart }

I'm surprised the application didn't crash when the chart had to deal with the null (nil value). Since nil is not a valid chart value, the chart can't do anything with it, hence an empty space. It is your job to deal with nil values.

[guoyutao]

You don't understand what I mean.I mean, how to achieve this effect,like the picture?

[HudsonGraeme]

Oh, I gotcha. Have you tried using nil?

[thierryH91200]

use 2 dataset it's simple
first dataset => x1 = 0 .. n
second dataset => x2 = n+1 .. m

[guoyutao]

@HudsonGraeme I've tried this way, But the Bouble type doesn't match.I've done by The way that @thierryH91200 provided

thank you very mach

[HudsonGraeme]

@guoyutao Glad you have it working, sorry I wasn't of much help.
@thierryH91200 Cheers!

[littledogboy]

@thierryH91200 That's a good idea!

[xiaowasly]

@guoyutao How did you achieve that, I also encountered a similar problem, can answer in detail