JMSL Chart 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.

import com.imsl.chart.*;
import java.awt.Color;

public class SampleSimpleLine extends JFrameChart {

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

        double y[] = {8, 3, 5, 2, 9};
        Data data1 = new Data(axis, y);
        data1.setDataType(Data.DATA_TYPE_LINE);
        data1.setLineColor(Color.blue);
    }
    
    public static void main(String argv[]) {
        new SampleSimpleLine().setVisible(true);
    }
}

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.

import com.imsl.chart.*;

public class SampleLineMarker extends JFrameChart {

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

        double x[] = {1, 3, 4, 5, 9};
        double y[] = {8, 3, 5, 2, 9};
        Data data = new Data(axis, x, y);
        data.setDataType(Data.DATA_TYPE_LINE | Data.DATA_TYPE_MARKER);
        data.setLineColor("blue");
        data.setMarkerColor("red");
        data.setMarkerType(Data.MARKER_TYPE_FILLED_SQUARE);
    }
    
    public static void main(String argv[]) {
        new SampleLineMarker().setVisible(true);
    }
}

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