Code samples of blog post Creating graphs in WPF using OxyPlot on http://blog.bartdemeyer.be

gistfile1.cs

public void UpdateModel()
{
    List<Measurement> measurements = Data.GetUpdateData(lastUpdate);
    var dataPerDetector = measurements.GroupBy(m => m.DetectorId).OrderBy(m => m.Key).ToList();

    foreach (var data in dataPerDetector)
    {
        var lineSerie = PlotModel.Series[data.Key] as LineSeries;
        if (lineSerie != null)
        {
            data.ToList()
                .ForEach(d => lineSerie.Points.Add(new DataPoint(DateTimeAxis.ToDouble(d.DateTime), d.Value)));
        }
    }
    lastUpdate = DateTime.Now;
}