How do I enter a 'null' value in a LineSeries?

Question

I have a 'line' of values where some information might be missing.

e.g.:

Jan - 10, Feb - 20, Mar - 15, Apr - null, Jun - 45 ... etc

I would expect that in the chart the NULL value will simply appear 'empty' (missing) from the line.

e.g.

I have tried using ChartValues<decimal?> but the chart complains in the XAML that it does not know how to plot Nullable1`.

Help?

score 4 · Accepted Answer · answered Jan 15 '17 at 16:06

4

LiveCharts uses double.NaN instead of null this is the example in the web site:

https://lvcharts.net/App/examples/v1/wpf/Missing%20Points

Series = new SeriesCollection
        {
            new LineSeries
            {
                Values = new ChartValues<double>
                {
                    4,
                    5,
                    7,
                    8,
                    double.NaN,
                    5,
                    2,
                    8,
                    double.NaN,
                    6,
                    2
                }
            }
        };

XAML

<lvc:CartesianChart Series="{Binding Series}"></lvc:CartesianChart>

answered Jan 15 '17 at 16:06

bto.rdz

6,636
4
35
52

Thank you, but I am confused as to why I can't use `decimal` in line chart. – hyankov Jan 15 '17 at 17:28
you can plot any type, sadly this feature requires double.nan, an alternative is to cast your decimal points to double – bto.rdz Jan 15 '17 at 18:49
Any idea how this works with `StepLine`? `Double.NaN` isn't allowed there. – C4d Jun 07 '17 at 12:00

How do I enter a 'null' value in a LineSeries?

1 Answers1