iOS Charting Documentation - SciChart iOS Charts SDK v3.x

The Scatter Series Type

Scatter Series can be created using the SCIXyScatterRenderableSeries type.

Scatter Series Type

NOTE: Examples for the Scatter Series can be found in the SciChart iOS Examples Suite as well as on GitHub:

The Scatter Series requires a shape to be specified for Point Markers. SciChart provides several shapes out of the box:

It is also possible to define custom shapes of the Point Markers. Please refer to the PointMarkers API article to learn more. You can also override colors of the Point Markers individually using The PaletteProvider API.

NOTE: In multi axis scenarios, a series has to be assigned to particular X and Y axes. This can be done passing the axes IDs to the ISCIRenderableSeries.xAxisId, ISCIRenderableSeries.yAxisId properties.

Create a Scatter Series

To create a SCIXyScatterRenderableSeries, use the following code:

// Assume a surface has been created and configured somewhere id<ISCIChartSurface> surface; // Create a PointMarker instance id<ISCIPointMarker> pointMarker = [SCIEllipsePointMarker new]; pointMarker.size = (CGSize){ .width = 40, .height = 40 }; pointMarker.strokeStyle = [[SCISolidPenStyle alloc] initWithColor:UIColor.greenColor thickness:2.0]; pointMarker.fillStyle = [[SCISolidBrushStyle alloc] initWithColor:UIColor.redColor]; // Create DataSeries and fill it with some data SCIXyDataSeries *dataSeries = [[SCIXyDataSeries alloc] initWithXType:SCIDataType_Double yType:SCIDataType_Double]; // Create and add Scatter Series id<ISCIRenderableSeries> scatterSeries = [SCIXyScatterRenderableSeries new]; scatterSeries.dataSeries = dataSeries; scatterSeries.pointMarker = pointMarker; [surface.renderableSeries add:scatterSeries];
// Assume a surface has been created and configured somewhere let surface: ISCIChartSurface // Create a PointMarker instance let pointMarker = SCIEllipsePointMarker() pointMarker.size = CGSize(width: 40, height: 40) pointMarker.strokeStyle = SCISolidPenStyle(color: .green, thickness: 2.0) pointMarker.fillStyle = SCISolidBrushStyle(color: .red) // Create DataSeries and fill it with some data let dataSeries = SCIXyDataSeries(xType: .double, yType: .double) // Create and add Scatter Series let scatterSeries = SCIXyScatterRenderableSeries() scatterSeries.pointMarker = pointMarker scatterSeries.dataSeries = dataSeries surface.renderableSeries.add(scatterSeries)
// Assume a surface has been created and configured somewhere IISCIChartSurface surface; // Create a PointMarker instance var pointMarker = new SCIEllipsePointMarker(); pointMarker.Size = new CGSize(40, 40); pointMarker.StrokeStyle = new SCISolidPenStyle(UIColor.Green, 2.0f); pointMarker.FillStyle = new SCISolidBrushStyle(UIColor.Red); // Create DataSeries and fill it with some data var dataSeries = new XyDataSeries(); // Create and add Scatter Series var scatterSeries = new SCIFastLineRenderableSeries(); scatterSeries.DataSeries = dataSeries; scatterSeries.PointMarker = pointMarker; surface.RenderableSeries.Add(scatterSeries);

In the code above, a Scatter Series instance is created. It is assigned to draw the data that is provided by the ISCIDataSeries assigned to it. The Scatters are drawn with a PointMarker provided by the SCIEllipsePointMarker instance. Finally, the Scatter Series is added to the ISCIChartSurface.renderableSeries property.

Scatter Series Features

Scatter Series also has some features similar to other series, such as:

Render a Gap in a Scatter Series

It’s possible to render a Gap in Scatter series, by passing a data point with a NaN as the Y value. Please refer to the RenderableSeries APIs article for more details.

Paint Scatters With Different Colors

In SciChart, you can draw each scatter of the Scatter Series with different colors using the PaletteProvider API. To Use palette provider for scatters - a custom ISCIPointMarkerPaletteProvider has to be provided to the ISCIRenderableSeries.paletteProvider property. Please refer to the PaletteProvider API article for more info.