Lab #02a 4 Diagram Exercise

ES --- MED 42
University Bremerhaven --- IAE
Lab #02a
4 Diagram Exercise (Pre FFT Lab)
Before coding the FFT algorithm the following lab exercise demonstrates to use diagrams
for the graphical output of the results.
" Create a new Netbeans project (Java Application) with the name:
JChartTst
" Copy the provided source code to you application and run the program.
package jchart2dtst;
import info.monitorenter.gui.chart.Chart2D;
import info.monitorenter.gui.chart.ITrace2D;
import info.monitorenter.gui.chart.traces.Trace2DSimple;
import java.awt.Color;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
public class JchartTst {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
int k;
double fx;
// Create a chart:
Chart2D chart = new Chart2D();
// Create an ITrace:
ITrace2D trace = new Trace2DSimple();
// Add the trace to the chart.
chart.addTrace(trace);
trace.setColor(Color.blue);
trace.setName("x[k]");
// always start in origin
trace.addPoint(0.0, 0.0);
// Add all points, as it is static:
for (k = 0; k < N_POINTS; k++) {
trace.addPoint(k, k);

ES --- MED 43
University Bremerhaven --- IAE
}
}
// Make it visible:
// Create a frame.
JFrame frame = new JFrame("Cosine Samples");
// add the chart to the frame:
frame.getContentPane().add(chart);
frame.setSize(400,300);
// Enable the termination button [cross on the upper right edge]:
frame.addWindowListener(
new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e){
System.exit(0);
}
}
);
frame.setVisible(true);
}
static final int N_POINTS = 16;
" This result should look as follows:
Figure 1.45: JChartTst output

ES --- MED 44
University Bremerhaven --- IAE
" Modify the source code to display cosine samples of one period. This result should
be as follows:
Figure 1.46: Modified JChartTst output with cosine samples