You are correct, I'm using two scatter charts one with lines and one without.  Both my Y and Y2 are numeric which led me to ask if a third chart that is 2D bar can use the common X and a new Y3 string?

Sorry, I'm not sure what you mean. Can you post a screenshot? Were you looking to move the bar layer up/down, or provide axis margins?

Yeah, something like moving the bar layer for example at point 20 along Y.  BTW I'm using 2d bar horizontal. In the attached image I need all bars to start above the highest Y point.  Hope that helps you to help me :) Thanks!

If your bar layer is always above your scatter layer, I would suggest drawing them in separate chart areas that are stacked one on top of the other. This would be the most straight forward approach.

Another approach is to set the Yaxis margins for each Y axis. For example, set far margin on the y axis used by the scatter layer to 50% and set the near margin on the Y axis used by the bar layer to 50% as well. This should give you sort of a split view, with bars above and other layers below.

do you have sample code to "stack" chart areas?  thanks!

Here's a possible example. 2 chart areas, one with bar, one with scatter layers.

ultraChart1.ChartType = ChartType.Composite;

ChartArea area1 = new ChartArea();
area1.Bounds = new Rectangle(0,0,100,52);
area1.BoundsMeasureType = MeasureType.Percentage;
area1.Border.Thickness = 0;
ultraChart1.CompositeChart.ChartAreas.Add(area1);

ChartArea area2 = new ChartArea();
area2.Bounds = new Rectangle(0,47,100,53);
area2.BoundsMeasureType = MeasureType.Percentage;
area2.Border.Thickness = 0;
ultraChart1.CompositeChart.ChartAreas.Add(area2);

AxisItem xAxisBar = new AxisItem(ultraChart1,AxisNumber.X_Axis);
xAxisBar.DataType = AxisDataType.Numeric;
area1.Axes.Add(xAxisBar);

AxisItem xAxisScatter = new AxisItem(ultraChart1, AxisNumber.X_Axis);
xAxisScatter.DataType = AxisDataType.Numeric;
area2.Axes.Add(xAxisScatter);

AxisItem yAxisBar = new AxisItem(ultraChart1, AxisNumber.Y_Axis);
yAxisBar.DataType = AxisDataType.String;
yAxisBar.SetLabelAxisType = SetLabelAxisType.GroupBySeries;
xAxisBar.Extent = 0;
xAxisBar.Visible = false;
area1.Axes.Add(yAxisBar);

AxisItem yAxisScatter = new AxisItem(ultraChart1,AxisNumber.Y_Axis);
yAxisScatter.DataType = AxisDataType.Numeric;
area2.Axes.Add(yAxisScatter);

ChartLayerAppearance barLayer = new ChartLayerAppearance();
barLayer.ChartType = ChartType.BarChart;
barLayer.ChartArea = area1;
barLayer.AxisX = xAxisBar;
barLayer.AxisY = yAxisBar;

NumericSeries barSeries = new NumericSeries();
barSeries.Points.Add(new NumericDataPoint(2, "pt1", false));
barSeries.Points.Add(new NumericDataPoint(1, "pt2", false));
barSeries.Points.Add(new NumericDataPoint(3, "pt3", false));
barLayer.Series.Add(barSeries);
ultraChart1.CompositeChart.Series.Add(barSeries);
ultraChart1.CompositeChart.ChartLayers.Add(barLayer);

ChartLayerAppearance scatterLayer = new ChartLayerAppearance();
scatterLayer.ChartType = ChartType.ScatterChart;
scatterLayer.ChartArea = area2;
scatterLayer.AxisX = xAxisScatter;
scatterLayer.AxisY = yAxisScatter;

XYSeries scatterSeries = new XYSeries();
scatterSeries.Points.Add(new XYDataPoint(1, 0, "pt1", false));
scatterSeries.Points.Add(new XYDataPoint(2, 3, "pt2", false));
scatterSeries.Points.Add(new XYDataPoint(5, 4, "pt3", false));
scatterLayer.Series.Add(scatterSeries);
ultraChart1.CompositeChart.Series.Add(scatterSeries);
ultraChart1.CompositeChart.ChartLayers.Add(scatterLayer);

Thanks Max.

Further search in the forums yielded http://news.infragistics.com/forums/p/22546/82634.aspx#82634 where you gave sample code as well.

The requirement here(to have time axis for bar/column/...) seems to be a common one. Are there any plans to support it directly, without having to workaround by creating two axes. Creating two axes is work, esp with the string axis not moving as smooth as time axis for moving data(ranges need to be set in sync with the time axis)

Sorry, all our column charts have to use a string x axis. You would have to create 2 different x axes to display a column layer and a time-based line layer.

Max,

  Is it possible to create a composite chart with two layers, one with line(or scatter) chart and the other with column chart(vertical bars). Both layers should use the same X-axis(which is a Timeaxis). Line chart uses Y-axis whereas the column chart uses Y2 axis.

   The problem that we have encountered is that in composite chart, the column chart supports only String type for X-axis.

Thanks,

Rambabu.

Unfortunately, that behavior isn't supported. You can write the entire bar layer in FillSceneGraph event any way you want. That's about the only workaround I can think of.