Infragistics Forums

I want to plot Volume on X-axis and Pressure on Y-axis,both X,Y data being of type double.How can I do this using LineChart in UltraChart? It appears that the X axis value always needs to be of type String or DateTime.

Also, I am using Box Annotation and want to know the Data Values on X-axis (Volume) where the Annotation area begins and ends. How can I find out the Data Value (for any of the axes) at a specific "point" on the Chart Area?

 Try handling the chart's FillSceneGraph event.  In there, you can reference the axis objects using this expression:

IAdvanceAxis xAxis = e.Grid["X"] as IAdvanceAxis;

then you can use the axis' Minimum/Maximum/MapMinimum/MapMaximum properties to get the information you need ... as well as the Map and MapInverse methods to convert pixels to data values or vice versa.