public static Frame <TRowKey, TColumnKey> DropSparseRows <TRowKey, TColumnKey>(this Frame <TRowKey, TColumnKey> frame)
{
return(FrameModule.DropSparseRows <TRowKey, TColumnKey>(frame));
}
/// <summary>
/// This code is based on the code developed by Chris Bayley
/// </summary>
public void Example01()
{
Console.WriteLine("Running Example01...");
// Systems we want to see in the chart
Tuple <long, String, Color>[] systemIds =
{
Tuple.Create(110751645L, "Stock Growth", Color.Red),
Tuple.Create(125206069L, "Marlin", Color.LightBlue),
Tuple.Create(106600099L, "VIXTrader Pro", Color.LightGreen)
};
// Set a preliminary Start Date
DateTime StartDate = DateTime.Parse("1-feb-2008");
// Find earliest start date common to all systems
foreach (var id in systemIds)
{
DateTime sysStartDate = (from s in C2SYSTEMS
where s.SystemId == id.Item1
select s.Started).First();
if (DateTime.Compare(sysStartDate, StartDate) > 0)
{
StartDate = sysStartDate;
}
}
// Get the Monthly equity data
ITimeSheet timeSheet = TimeSheetFactory(systemIds.Select(id => id.Item1), TimeInterval.Month, EquityType.Equity);
// ===================================================================
// Here, a developer writes the exactly same code as on the web page.
// ===================================================================
// Say - a developer wants to play with timeSheet.
// IntelliSense in action:
var Developer_Trying_To_Do_Something = timeSheet.Commissions.CalcCommissions(systemIds[0].Item1);
TABLE = timeSheet.GetEquitiesSheet();
//// Create a chart object
//ITimeSeriesChart chart = new TimeSeriesChart();
//chart.Name = String.Format("Chris Bayley Chart");
//// Add data
//foreach (Tuple<long, String, Color> system in systemIds)
//{
// chart.Add(timeSheet.GetColumn(system.Item1, EquityType.Equity), system.Item2, system.Item3);
//}
//// Enjoy!
//CHART = chart;
// return the EquitySheet as a Deedle.Frame
var sparseEquityFrame = timeSheet.DataFrame;
// Drop the rows from the frame which dont have data for all systems
var denseEquityFrame = FrameModule.DropSparseRows(sparseEquityFrame);
// ??? QUESTION 1:
// Now I have the data I want in denseEquityFrame and I wish to convert it to IEnumerable for display by TABLE=
IEnumerable <string> rowKeyNames = new string[] { "KeyName" };
var equityDataTable = denseEquityFrame.ToDataTable(rowKeyNames);
// Next line yields this error:
// *** Error: Error CS0266: 139:7 Cannot implicitly convert type 'System.Data.DataTable' to
// 'System.Collections.Generic.IEnumerable<object>'. An explicit conversion exists (are you missing a cast?)
// If an explict conversion exits, what is it ??
//TABLE=equityDataTable;
// ??? QUESTION 2:
// return Equity Sheet as IEnumerable to use with TABLE=
// I can do this but it includes Dates I don't want
var equityTable = timeSheet.GetEquitiesSheet();
// So I'd like to do this:
// equityTable = timeSheet.GetEquitiesSheet().Where(z => z.Item1 >= StartDate);
// but that yields:
// *** Error: Error CS1061: 146:62 'object' does not contain a definition for 'Item1' and no extension method 'Item1'
// accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?)
TABLE = equityTable;
// ============ LOCAL DEBUGGING IN VISUAL STUDIO ========
FrameExtensions.Print(denseEquityFrame);
//FrameExtensions.Print(((Frame<DateTime, string>)equityTable.ElementAt(1)).GetFrameData());
FrameExtensions.Print <DateTime, string>(timeSheet.DataFrame);
Console.WriteLine("Example01 done. Press ENTER");
Console.ReadLine();
}
