我有一个100,000个样本的数组,所有样本都是double类型。我想显示或绘制这个数组,以便我得到一个移动的图表/图表(动态)而不是一次显示它。谁能帮我吗。在图ee []和y []是在经过一些处理后得到的。
private byte[] FileR(String filename) {
byte[] data = null;
AudioInputStream ais;
try {
File fileIn = new File(filename);
if (fileIn.exists()) {
ais = AudioSystem.getAudioInputStream(fileIn);
data = new byte[ais.available()];
ais.read(data);
}
} catch (UnsupportedAudioFileException | IOException e) {
System.out.println(e.getMessage());
throw new RuntimeException("Could not read " + filename);
}
return data;
}
private byte[] Capture(double t) throws LineUnavailableException {
AudioFormat format = new AudioFormat(48000, 16, 2, true, false);
DataLine.Info info = new DataLine.Info(TargetDataLine.class, format);
line = (TargetDataLine) AudioSystem.getLine(info);
line.open(format);
line.open();
int size = (int) (line.getBufferSize() * t);
byte[] b = new byte[size];
line.start();
line.read(b, 0, size);
return b;
}
private void plot(double[] ee, double[] y) {
XYSeries see = new XYSeries("Filtered");
for (int i = 0; i < ee.length; i++) {
see.add(i, ee[i]);
}
XYSeriesCollection cee = new XYSeriesCollection();
cee.addSeries(see);
XYItemRenderer ree = new StandardXYItemRenderer();
NumberAxis rangeAxisee = new NumberAxis("Filtered");
XYPlot subplot1 = new XYPlot(cee, null, rangeAxisee, ree);
subplot1.setRangeAxisLocation(AxisLocation.BOTTOM_OR_LEFT);
XYSeries sy = new XYSeries("Noisy");
for (int i = 0; i < y.length; i++) {
sy.add(i, y[i]);
}
XYSeriesCollection cy = new XYSeriesCollection();
cy.addSeries(sy);
XYItemRenderer ry = new StandardXYItemRenderer();
NumberAxis rangeAxisy = new NumberAxis("Noisy");
XYPlot subplot2 = new XYPlot(cy, null, rangeAxisy, ry);
subplot2.setRangeAxisLocation(AxisLocation.BOTTOM_OR_LEFT);
CombinedDomainXYPlot plot = new CombinedDomainXYPlot(new NumberAxis("Domain"));
plot.setGap(10.0);
plot.add(subplot1);
plot.add(subplot2);
plot.setOrientation(PlotOrientation.VERTICAL);
JFreeChart chart = new JFreeChart("Adaptive Filter", JFreeChart.DEFAULT_TITLE_FONT, plot, true);
panel = new ChartPanel(chart, true, true, true, false, true);
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(750, 500);
frame.add(panel, BorderLayout.CENTER);
frame.setVisible(true);
}
答案 0 :(得分:0)
您需要有一个主题,其中包含所有这些数据。例如从你的后端。然后,每当图表有一组新数据时,您需要通过事件调度线程更新图表。如果您的图表数据是定期进行的,那么相当容易(即拉动),但如果它是推送(即数据更随机),并且可能会变得更加棘手。
从绘图方法中删除所有GUI创建:
JFreeChart chart = new JFreeChart("Adaptive Filter", JFreeChart.DEFAULT_TITLE_FONT, plot, true);
panel = new ChartPanel(chart, true, true, true, false, true);
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(750, 500);
frame.add(panel, BorderLayout.CENTER);
frame.setVisible(true);
这只需要调用一次。每次有新数据时都会调用 plot 方法。
这是一个简单的方法:
public void startCharting() {
final MySoundCard card = new MySoundCard();
final MyJFreeChart chart = new MyJFreeChart();
Runnable r = new Runnable() {
@Override
public void run() {
while(true) {
int[] i = card.FileR();
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
chart.plot();
}
});
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
};
Thread t = new Thread(r);
t.start();
}
线程每秒调用一次数据源,然后更新图表。在事件调度线程中调用更新。