IMSL C# Programmer’s Guide

Charting 2D Types >> Line Plot

Line Plot

A line plot consists of points connected by lines. The lines can be formatted using the Line Attributes.

Simple Line Plot

This example shows a simple line plot. The Data node is created using an array of y-values. The x-values default to 0, 1, .... The DataType attribute is set to DATA_TYPE_LINE to make this a line chart. The look of the line is controlled by the line attributes. Here the LineColor attribute is set to blue.

using Imsl.Chart2D;
using System.Drawing;

public class SampleSimpleLine : FrameChart {

    public SampleSimpleLine() {
        Chart chart = this.Chart;
        AxisXY axis = new AxisXY(chart);

        double[] y = new double[] {8, 3, 5, 2, 9};
        Data data1 = new Data(axis, y);
        data1.DataType = Data.DATA_TYPE_LINE;
        data1.LineColor = Color.Blue;
    }

    public static void Main(string[] argv) {
        System.Windows.Forms.Application.Run(new SampleSimpleLine());
    }
}

Mixed Line and Marker Plot

The DataType attribute can be set using “or” syntax to combine types. In this example, it is set to DATA_TYPE_LINE | DATA_TYPE_MARKER. This example also explicitly sets both the x and the y values of the data points. Note that the x values do not have to be uniformly spaced.

using Imsl.Chart2D;
using System.Drawing;

public class SampleLineMarker : FrameChart {

    public SampleLineMarker() {
        Chart chart = this.Chart;
        AxisXY axis = new AxisXY(chart);

        double[] x = new double[] {1, 3, 4, 5, 9};
        double[] y = new double[] {8, 3, 5, 2, 9};
        Data data1 = new Data(axis, x, y);
        data1.DataType = Data.DATA_TYPE_LINE | Data.DATA_TYPE_MARKER;
        data1.LineColor = Color.Blue;
        data1.MarkerColor = Color.Red;
        data1.MarkerType = Data.MARKER_TYPE_FILLED_SQUARE;
    }

    public static void Main(string[] argv) {
        System.Windows.Forms.Application.Run(new SampleLineMarker());
    }
}

©  Visual Numerics, Inc.  All rights reserved.