Exception when plotting line charts with starting/ending nan values

[cristi-zz]

Cheers and congrats on an amazing library!

I am plotting LineChartBarData that contains several NaN values at the beginning/ending of List

I got exception:

The following assertion was thrown during paint():
'package:fl_chart/src/utils/utils.dart': Failed assertion: line 182 pos 10: 'input >= 1.0': is not true.

The relevant error-causing widget was: 
  LineChart LineChart:file:///home/visoft/work/homeautoapp/lib/graphs.dart:104:19
When the exception was thrown, this was the stack: 
#2      _roundIntervalAboveOne (package:fl_chart/src/utils/utils.dart:182:10)
#3      roundInterval (package:fl_chart/src/utils/utils.dart:149:10)
#4      getEfficientInterval (package:fl_chart/src/utils/utils.dart:141:10)
#5      AxisChartPainter._drawGrid (package:fl_chart/src/chart/base/axis_chart/axis_chart_painter.dart:274:11)
#6      AxisChartPainter.paint (package:fl_chart/src/chart/base/axis_chart/axis_chart_painter.dart:41:5)
#7      LineChartPainter.paint (package:fl_chart/src/chart/line_chart/line_chart_painter.dart:80:11)
#8      RenderLineChart.paint (package:fl_chart/src/chart/line_chart/line_chart_renderer.dart:75:14)
#9      RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2409:7)

Tried:
To add FlSpot.nullSpot, to add correct x value but double.nan for y.
However everything works fine if the null spots are "in the middle" of the series. Also works by adding dummy real values. But it defeats the purpose of showing that the data is missing (relevant)

Do I have workarounds?
Kind thanks!

Flutter Channel stable, 2.5.3, on Ubuntu 20.04.3
fl_chart: version: "0.40.6"

[cristi-zz]

Workaround: Just remove all the nullSpots/nans. Drawback: data logic (eg axis, view windows is a bit harder) and missing data in the middle are "interpolated" with a line between known values. Not best, but ok given that I was in rush.

[Josutoral]

Tendrian que solucionar esto.

[imaNNeo]

Hi. As I explained in the issue template, It helps me a lot if you provide a reproducible code (in a main.dart function).

Thanks!

[imaNNeo]

Hi.
We have just fixed it in 0.45.0.
Please check it out!