Example 006: Graph showing use of Null Data Gaps

1// This example builds upon the basic CreateSimpleGraph '000' example chart //
2CreateSimpleGraph(Pego1);
3 
4// Change Null Data Value //
5// Note that Scientific Graph has NullDataValueX and NullDataValueY //
6Pego1.PeData.NullDataValue = -9999.0;
7 
8// Change to two subsets and set a few data points to nulls //
9Pego1.PeData.Subsets = 2;
10 
11Pego1.PeData.Y[0, 3] = -9999;
12Pego1.PeData.Y[0, 4] = -9999;
13Pego1.PeData.Y[0, 5] = -9999;
14 
15Pego1.PeData.Y[1, 5] = -9999; //! Note that (1,6) and (1,8) are valid points
16Pego1.PeData.Y[1, 7] = -9999; //! You will see symbols for these points because
17Pego1.PeData.Y[1, 9] = -9999; //! they are surrounded by nulls.
18 
19// Set line Plotting Method //
20Pego1.PePlot.Method = GraphPlottingMethod.PointsPlusLine;
21 
22// Enable Null Data Gaps //
23// Using NullDataGaps, the subset's line will stop before null data values //
24// If this line is commented out, then line will extend to next non-null //
25Pego1.PePlot.Option.NullDataGaps = true;
26 
27// Other various properties //
28Pego1.PeColor.BitmapGradientMode = true;
29Pego1.PeColor.QuickStyle = QuickStyle.MediumInset;
30Pego1.PePlot.MarkDataPoints = true;
31 
32// Generally call ReinitializeResetImage at end **'
33Pego1.PeFunction.ReinitializeResetImage();
34Pego1.Invalidate();
35// Optionally call Pego1.Refresh() if you are not seeing changes immediately