How do I draw the line chart with unpontinuous numbers in iOS Charts?

Question

I'm working on drawing the line chart with data like: [50,40,60,-,80,-,70,10] and couldn't figure out how I draw the line for these data.

"-" means no value, not zero.

Guessed that Charts would accept nil for it, but it doesn't.

Please let me know if you have the answer for this.

Thank you in advance.

Is this question about how to handle this in the Charts framework or what? Please clarify your question. — Joakim Danielson, Jan 27 '20 at 17:37

score 3 · Answer 1 · edited Jan 28 '20 at 09:03

3

U can pass Double.nan to the dataSet for nil value entries.

swift

let value = ChartDataEntry(x:Double(i),y:Double.nan)

but u should separate two datasets for no value data and numeric values data if not the line won't be connected each other.

edited Jan 28 '20 at 09:03

Dmitrii Leonov

answered Jan 28 '20 at 08:04

Trexano Truong

This approach didn't work for me, encountered error - Error: this application, or a library it uses, has passed an invalid numeric value (NaN, or not-a-number) to CoreGraphics API and this value is being ignored. Please fix this problem. Please suggest a solution for this if possible. – Rocky Sep 10 '22 at 17:54

1 Answers1