c# How to invert Y Axis with Live Charts

Question

I\'m trying to simply invert the Y Axis so this graph it goes up instead of down.

Starting at 6 going up to 1.

This is the user doc on inverted graphs

ht

Answer 1

To keep it simple, I would use negative negative values, and then format the labels:

<lvc:CartesianChart>
        <lvc:CartesianChart.Series>
            <lvc:LineSeries Values="{Binding Values}"></lvc:LineSeries>
        </lvc:CartesianChart.Series>
        <lvc:CartesianChart.AxisY>
            <lvc:Axis MinValue="-10" MaxValue="-1" LabelFormatter="{Binding Formatter}">
                <lvc:Axis.Separator>
                    <!--to force the display of all the labels all the time
                    lets force the step-->
                    <lvc:Separator Step="1"></lvc:Separator>
                </lvc:Axis.Separator>
            </lvc:Axis>
        </lvc:CartesianChart.AxisY>
    </lvc:CartesianChart>

Code Behind:

Values = new ChartValues<double>
        {
            -1,
            -2,
            -3,
            -4,
            -5,
            -6,
            -7,
            -8,
            -9
        };

Formatter = x => x*-1 + " place";

Edit

The previous option is an specific solution for this question, to invert an axis you need to:

 var invertedYMapper = LiveCharts.Configurations.Mappers.Xy<ObservablePoint>()
            .X(point => point.X)
            .Y(point => -point.Y);

        var lineSeries = new LineSeries
        {
            Values = new ChartValues<ObservablePoint>
                {
                    new ObservablePoint(0,2),
                    new ObservablePoint(1,5),
                    new ObservablePoint(2,7)
                }
        };

        // set the inverted mapping...
        lineSeries.Configuration = invertedYMapper;

        var seriesCollection = new SeriesCollection
        {
            lineSeries
        };

        // correct the labels
        var YAxis = new Axis
        {
            LabelFormatter = x => (x * -1).ToString()
        };
        cartesianChart1.AxisY.Add(YAxis);

        cartesianChart1.Series = seriesCollection;