/// <summary>
/// Helper function for plotting.
/// </summary>
private void Plot(string yAxisColumnName, string xAxisColumnName, IDataFrame dataFrame)
{
var subset = dataFrame.GetColumnsSubset(new string[] { yAxisColumnName, xAxisColumnName });
var series = new Series(xAxisColumnName);
foreach (var entry in subset.GetValues<DateTime, float>())
{
series.Points.AddXY(entry.Item1, entry.Item2);
}
this.chart1.Series.Add(series);
}