Where is YAxisKey used and how

I see plenty reference to YAxisKey, but I cannot find an implemented series that have this property; what am I missing?

Ambron,

The key is used to link (or key) an axis to a series. This will insure that the series all appear in the plot area. In this example I have 3 x-axes and 1 y-axis in a single plot, with the x-axes at the bottom of the chart laid in "tiers". You can see how I used the key property.

For i = 1 To 3

Dim ax As LinearAxis
ax = New LinearAxis(AxisPosition.Bottom, 0, 50*i, "Title")
ax.Key = "key" & i.ToString
ax.PositionTier = i - 1
ax.IsZoomEnabled = False

ax.Font = "Trebuchet MS"
ax.FontSize = 12.0
ax.FontWeight = OxyPlot.FontWeights.Bold

ax.TitleFont = "Trebuchet MS"
ax.TitleFontSize = 12.0
ax.TitleFontWeight = OxyPlot.FontWeights.Bold

myModel.Axes.Add(ax)

Next

For i = 1 To 3

Dim lineSeries0 As New LineSeries()
lineSeries0.Title = "Title"

lineSeries0.Color = OxyColors.Black
lineSeries0.StrokeThickness = 1.25

lineSeries0.MarkerFill = OxyColors.Red
lineSeries0.MarkerSize = 5.0
lineSeries0.MarkerStroke = OxyColors.DarkGray
lineSeries0.MarkerStrokeThickness = 1.0
lineSeries0.MarkerType = MarkerType.Circle

For j = 0 To dataseriesC.Points.Count - 1
 dp = dataseriesC.Points(j)
 lineSeries0.Points.Add(dp)
Next

lineSeries0.CanTrackerInterpolatePoints = False
lineSeries0.XAxisKey = "key" & i.ToString
myModel.Series.Add(lineSeries0)

Next

That is indeed how I understood it should work.
I probably should have added some more detail; in the .Net OxyPlot assemblies (notably OxyPlot.Wpf ) there is no XAxisKey property for a lineSeries
Hence the question, what am I missing?

To elaborate:

I have a ViewModel that creates an

var dateAxis = new OxyPlot.Axes.DateTimeAxis(AxisPosition.Bottom, "Time", "HH:mm")

        {
            MajorGridlineStyle = LineStyle.Solid,
            MinorGridlineStyle = LineStyle.Dot,
            IntervalLength = 80
        };
        var tempAxis = new OxyPlot.Axes.LinearAxis(AxisPosition.Left, "Temperature") {Key = "Temp"};
        var humAxis = new OxyPlot.Axes.LinearAxis(AxisPosition.Right, "Humidity") {Key = "Hum"}; 


        model.Axes.Add(dateAxis);
        model.Axes.Add(tempAxis);
        model.Axes.Add(humAxis); 

apologies, browser playing up.. So I create the OxyModel in a ViewModel which I den populate with line-series, based on the location and whether it is a temperature or Humidity.

so when the data comes in I add the points with something like this, where I would want to use YAxisKey

private static void AddNamedValue(PlotModel plotModel, string name, DateTime time, decimal value)

    {
        var s = plotModel.Series.FirstOrDefault(ms => ms.Title == name);
        if (s == null)
        {
            s = new OxyPlot.Series.LineSeries { Title = name };
            //if (name.StartsWith("Hum"))
            //    s.YAxisKey = "Hum";
            plotModel.Series.Add(s);
        }
        var ls = s as OxyPlot.Series.LineSeries;
        ls.Points.Add(new DataPoint(OxyPlot.Axes.DateTimeAxis.ToDouble(time), (Double)value));
    }