h2. 4.3.8 Line Plot charts

A line plot is a graph that represents raw data in groups and shows distribution of the data by frequency of occurrence by classes.

Sample

For instance, factory is producing steel cables. Its lengths were measured at 25 different occurrences by taking 4 samples each time.

S1	144	146	154	146
S2	150	150	134	153
S3	145	139	143	152
S4	154	146	152	148
S5	157	153	155	157
S6	157	150	145	147
S7	149	144	137	155
S8	141	147	149	155
S9	158	150	149	156
S10	145	148	152	154
S11	151	150	154	153
S12	155	145	152	148
S13	152	146	152	142
S14	144	160	150	149
S15	150	146	148	157
S16	147	144	148	149
S17	155	150	153	148
S18	157	148	149	153
S19	153	155	149	151
S20	155	142	150	150
S21	146	156	148	160
S22	152	147	158	154
S23	143	156	151	151
S24	151	152	157	149
S25	154	140	157	151

In order to draw a LinePlot chart for the gathered data:

Create chart's data model:

/*
 * Creating data model
*/
ChartDataModel dataModel = new ChartDataModel();
dataModel.addKeyValues(("S1"), new Object[] { 144., 146., 154., 146. });
dataModel.addKeyValues(("S2"), new Object[] { 151., 150., 134., 153. });
dataModel.addKeyValues(("S3"), new Object[] { 145., 139., 143., 152. });
//.......

Create chart:

/* Creates LinePlotChart object named chart, where
*    dataModel contains data which we want to plot
*    1 - is the number which indicates how many intervals there should be */
LinePlotChart chart = new LinePlotChart(dataModel, 1);

Figure 4.3.8.1 Line Plot Chart Demonstration

View Source

Figure 4.3.8.1: Line Plot Chart Demonstration

import java.awt.*;
import javax.swing.JFrame;
import lt.monarch.chart.engine.SimpleHotSpotMap;
import lt.monarch.chart.models.ChartDataModel;
import lt.monarch.chart.spc.LinePlotChart;
import lt.monarch.chart.swing.JChartPanel;
import lt.monarch.chart.view.LabeledChart;
 
public class LinePlotDemo extends JFrame
{
 
  private transient JChartPanel m_chartPanel;
 
  public LinePlotDemo ()
  {
 
    initChart();
    setLayout(new BorderLayout());
    add(m_chartPanel, BorderLayout.CENTER);
 
  }
 
  protected void initChart()
  {
    /*
     * Creating data model
     */
    ChartDataModel dataModel = new ChartDataModel();
 
    dataModel.addKeyValues(("S1"), new Object[] { 144., 146., 154., 146. });
    dataModel.addKeyValues(("S2"), new Object[] { 151., 150., 134., 153. });
    dataModel.addKeyValues(("S3"), new Object[] { 145., 139., 143., 152. });
    dataModel.addKeyValues(("S4"), new Object[] { 154., 146., 152., 148. });
    dataModel.addKeyValues(("S5"), new Object[] { 157., 153., 155., 157. });
    dataModel.addKeyValues(("S6"), new Object[] { 157., 150., 145., 147. });
    dataModel.addKeyValues(("S7"), new Object[] { 149., 144., 137., 155. });
    dataModel.addKeyValues(("S8"), new Object[] { 141., 147., 149., 155. });
    dataModel.addKeyValues(("S9"), new Object[] { 158., 150., 149., 156. });
    dataModel.addKeyValues(("S10"), new Object[] { 145., 148., 152., 154. });
    dataModel.addKeyValues(("S11"), new Object[] { 151., 150., 154., 153. });
    dataModel.addKeyValues(("S12"), new Object[] { 155., 145., 152., 148. });
    dataModel.addKeyValues(("S13"), new Object[] { 152., 146., 152., 142. });
    dataModel.addKeyValues(("S14"), new Object[] { 144., 160., 150., 149. });
    dataModel.addKeyValues(("S14"), new Object[] { 150., 146., 148., 157. });
    dataModel.addKeyValues(("S14"), new Object[] { 147., 144., 148., 149. });
    dataModel.addKeyValues(("S14"), new Object[] { 155., 150., 153., 148. });
    dataModel.addKeyValues(("S14"), new Object[] { 157., 148., 149., 153. });
    dataModel.addKeyValues(("S14"), new Object[] { 153., 155., 149., 151. });
    dataModel.addKeyValues(("S14"), new Object[] { 155., 142., 150., 150. });
    dataModel.addKeyValues(("S14"), new Object[] { 146., 156., 148., 160. });
    dataModel.addKeyValues(("S14"), new Object[] { 152., 147., 158., 154. });
    dataModel.addKeyValues(("S14"), new Object[] { 143., 156., 151., 151. });
    dataModel.addKeyValues(("S14"), new Object[] { 151., 152., 157., 149. });
    dataModel.addKeyValues(("S14"), new Object[] { 154., 140., 157., 151. });
 
    /*
     * Creates LinePlotChart object named chart, where dataModel contains data which we want to plot 1 - is the number which indicates how many intervals there should be
     */
    LinePlotChart chart = new LinePlotChart(dataModel, 1);
 
    LabeledChart m_chart = new LabeledChart(cc);
    m_chart.setTitle("Lengths of steel rods (mm) - Line Plot");
 
    m_chartPanel = new JChartPanel(m_chart);
    m_chartPanel.setHotSpotMap(new SimpleHotSpotMap());
  }
 
  public static void main(String[] args)
  {
    LinePlotDemo frame = new LinePlotDemo();
    frame.setSize(new Dimension(800, 600));
    frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
    frame.setTitle("Lengths of steel rods (mm) - Line Plot");
    frame.setVisible(true);
  }
}

S1	144	146	154	146
S2	150	150	134	153
S3	145	139	143	152
S4	154	146	152	148
S5	157	153	155	157
S6	157	150	145	147
S7	149	144	137	155
S8	141	147	149	155
S9	158	150	149	156
S10	145	148	152	154
S11	151	150	154	153
S12	155	145	152	148
S13	152	146	152	142
S14	144	160	150	149
S15	150	146	148	157
S16	147	144	148	149
S17	155	150	153	148
S18	157	148	149	153
S19	153	155	149	151
S20	155	142	150	150
S21	146	156	148	160
S22	152	147	158	154
S23	143	156	151	151
S24	151	152	157	149
S25	154	140	157	151

S1	144	146	154	146
S2	150	150	134	153
S3	145	139	143	152
S4	154	146	152	148
S5	157	153	155	157
S6	157	150	145	147
S7	149	144	137	155
S8	141	147	149	155
S9	158	150	149	156
S10	145	148	152	154
S11	151	150	154	153
S12	155	145	152	148
S13	152	146	152	142
S14	144	160	150	149
S15	150	146	148	157
S16	147	144	148	149
S17	155	150	153	148
S18	157	148	149	153
S19	153	155	149	151
S20	155	142	150	150
S21	146	156	148	160
S22	152	147	158	154
S23	143	156	151	151
S24	151	152	157	149
S25	154	140	157	151

S1	144	146	154	146
S2	150	150	134	153
S3	145	139	143	152
S4	154	146	152	148
S5	157	153	155	157
S6	157	150	145	147
S7	149	144	137	155
S8	141	147	149	155
S9	158	150	149	156
S10	145	148	152	154
S11	151	150	154	153
S12	155	145	152	148
S13	152	146	152	142
S14	144	160	150	149
S15	150	146	148	157
S16	147	144	148	149
S17	155	150	153	148
S18	157	148	149	153
S19	153	155	149	151
S20	155	142	150	150
S21	146	156	148	160
S22	152	147	158	154
S23	143	156	151	151
S24	151	152	157	149
S25	154	140	157	151