Home > Sample Charts > TraceChart > Adding Categories

Adding Categories

Trace charts are a slightly specialist style of plot, originally designed for data from devices like seismographs and EEGs where multiple pens trace out (almost) parallel lines. Each pen is allocated a tickmark on the Y-axis and then an ‘inner axis’ is created for it (naturally these inner axes are all scaled identically).

All styles of Tracechart can categorise data by cycling through colors of fill-styles. The example chooses to segregate two types of tree species, but otherwise is identical to the third chart in this set.

SharpPlot sp = new SharpPlot;

sycamore = new int[] {0,0,0,0,0,0,0,1,2,2,2,2};
chestnut = new int[] {0,1,1,1,2,3,3,3,3,2,1,0};

sp.YCaption = "Species";
sp.YAxisStyle = YAxisStyles.AtEndCaption|YAxisStyles.GridLines;
sp.SetYLabels(new string[]{"Oak","Ash","Birch","Hazel","Sycamore","Horse Chestnut"});

sp.XAxisStyle = XAxisStyles.ArrowedAxis;
sp.YLabelFormat = "XXXXXXXX;";
sp.MarginLeft = 48;

sp.TraceChartStyle = TraceChartStyles.KiteDiagram;
sp.IAxisStyle = IAxisStyles.PlainAxis;
sp.SetFillStyles(FillStyle.Saturate80);

sp.KeyStyle = KeyStyles.Boxed|KeyStyles.Shadowed;
native = new string[]{"Native","Native","Native","Native","Alien","Alien"};
sp.SplitBy(native);

sp.SetColors(new Color[]{Color.Green,Color.OrangeRed});

trace = new int[][]{oak,ash,birch,hazel,sycamore,chestnut};
sp.DrawTraceChart(trace);

Worked Examples

Send comments on this topic
© Dyalog Ltd 2013