如何在java的jfreechart中从范围轴获取后在域轴上设置刻度单位？

Question

我在Java有点新。现在，我正在尝试使用JFreeChart绘制XYPlot，其中域轴（X轴）和范围轴（Y轴）包含相同的范围。但不幸的是，滴答单位是不同的！出于这个原因，我尝试使用NumberAxis根据范围轴上的范围和刻度单位在域轴上设置范围和刻度单位。但差异仍然存在。我仍然无法找出为什么会发生这种情况。我正在附加此绘图的代码。此外，我正在附加问题的屏幕截图以及我真正想要的！请指导我在这里做错了什么...    XYSeriesCollection lineChartDataAD = new XYSeriesCollection();    XYSeries seriesAD = new XYSeries("Real Surface Heights", false, true);    for (int m = 0; m < pt.delayedy.length - 1; m++) {        seriesAD.add((double)pt.delayedy[m], (double)pt.delayedy[m+1]);    }    lineChartDataAD.addSeries(seriesAD);                   if (jRadioButton10.isSelected()) { //as it is       checkbox2.getState() == true        pt.xaxisAD = pt.yvar+" ("+pt.xvar+") ["+pt.yunit+"]";        pt.yaxisADsupport = String.format("%f", (pt.xspace*pt.delay));        //pt.yaxisAD = pt.yvar +" (i+"+pt.yaxisADsupport+")";        pt.yaxisAD = pt.yvar+" ("+pt.xvar+"+d) ["+pt.yunit+"]";        jLabel44.setText("(Delay (d) = "+pt.yaxisADsupport+" "+pt.xunit+")");    }    else if (jRadioButton11.isSelected()) { //as time series  checkbox1.getState() == true        //pt.yaxisAD = pt.yvar +" (i+"+pt.delay+")";        pt.xaxisAD = pt.yvar+" (i) ["+pt.yunit+"]";        pt.yaxisAD = pt.yvar +" (i+d) ["+pt.yunit+"]";        jLabel44.setText("(Delay (d) = "+pt.delay+")");    }    JFreeChart lineChartAD = ChartFactory.createXYLineChart("", pt.xaxisAD, pt.yaxisAD, (XYDataset) lineChartDataAD, PlotOrientation.VERTICAL, false, false, false);    XYPlot plotAD  = lineChartAD.getXYPlot();    NumberAxis D = (NumberAxis) plotAD.getDomainAxis();    NumberAxis R = (NumberAxis) plotAD.getRangeAxis();    D.setRange(R.getRange());    D.setTickUnit(R.getTickUnit());                    XYLineAndShapeRenderer rendererAD = new XYLineAndShapeRenderer();问题||的屏幕截图刻度单位不同所需结果||的屏幕截图两个轴上的刻度单位相同

Answer 1

最后，我有一个解决这个问题的解决方法！而我还不知道这个问题的确切解决方案。

而不是尝试以下代码行，

NumberAxis D = (NumberAxis) plotAD.getDomainAxis(); 

NumberAxis R = (NumberAxis) plotAD.getRangeAxis(); 

D.setRange(R.getRange()); 

D.setTickUnit(R.getTickUnit());

我尝试了以下代码行：

//getting the number axes from the plot

NumberAxis D = (NumberAxis) plotAD.getDomainAxis();

NumberAxis R = (NumberAxis) plotAD.getRangeAxis();

//creating custom tick units based on lower and upper bound

Double DT = (D.getUpperBound() - D.getLowerBound())/5;

DecimalFormat DF = new DecimalFormat("#.#");

DF.setRoundingMode(RoundingMode.FLOOR);

String DTS = DF.format(DT);

DT = Double.parseDouble(DTS);

D.setTickUnit(new NumberTickUnit(DT));

Double RT = (R.getUpperBound() - R.getLowerBound())/5;

String RTS = DF.format(RT);

RT = Double.parseDouble(RTS);

R.setTickUnit(new NumberTickUnit(RT));

它的工作原理!!!请参阅下面附带的屏幕截图，这就是我想要的，两个轴上的相同刻度单位...

下面还给出了这种绘图的完整代码（可能会增加一些代码行，但我很高兴它适用于任何情况，直到我得到这个问题的确切解决方案）：

//Creating XYseries based on an array (i.e., pt.delayedy)

XYSeriesCollection lineChartDataAD = new XYSeriesCollection();

XYSeries seriesAD = new XYSeries("Real Surface Heights", false, true);

for (int m = 0; m < pt.delayedy.length - 1; m++) {            

    seriesAD.add((double)pt.delayedy[m], (double)pt.delayedy[m+1]);

}

lineChartDataAD.addSeries(seriesAD);

//Customizing my axis labels (required for my purpose)

if (jRadioButton10.isSelected()) {

   pt.xaxisAD = pt.yvar+" ("+pt.xvar+") ["+pt.yunit+"]";

   pt.yaxisADsupport = String.format("%f", (pt.xspace*pt.delay));            

   pt.yaxisAD = pt.yvar+" ("+pt.xvar+"+d) ["+pt.yunit+"]";      

}

else if (jRadioButton11.isSelected()) {            

   pt.xaxisAD = pt.yvar+" (i) ["+pt.yunit+"]";

   pt.yaxisAD = pt.yvar +" (i+d) ["+pt.yunit+"]";

   jLabel44.setText("(Delay (d) = "+pt.delay+")");

}

//Creating a JFreechart with my labels and series

JFreeChart lineChartAD = ChartFactory.createXYLineChart("", pt.xaxisAD, pt.yaxisAD, (XYDataset) lineChartDataAD, PlotOrientation.VERTICAL, false, false, false);

//Getting the chart plot

XYPlot plotAD  = lineChartAD.getXYPlot();

//Creating the renderer for the chart

XYLineAndShapeRenderer rendererAD = new XYLineAndShapeRenderer();

rendererAD.setSeriesPaint(0, Color.BLACK);

double sizeAD = 0;

double deltaAD = sizeAD / 2.0;

Shape shapeAD = new Rectangle2D.Double(-deltaAD, -deltaAD, sizeAD, sizeAD);

rendererAD.setSeriesShape(0, shapeAD);

rendererAD.setSeriesStroke(0, new BasicStroke(1.0f));

//Customizing the font of the axes labels

Font F1AD = new Font ("Times New Roman", Font.PLAIN, 14);        

plotAD.getDomainAxis().setLabelFont(F1AD);

plotAD.getRangeAxis().setLabelFont(F1AD);

//The below lines are for exact same x-scaling and y-scaling in plot

NumberAxis D = (NumberAxis) plotAD.getDomainAxis();

NumberAxis R = (NumberAxis) plotAD.getRangeAxis();

D.setAutoRangeIncludesZero(false);

R.setAutoRangeIncludesZero(false);

Double DT = (D.getUpperBound() - D.getLowerBound())/5;

DecimalFormat DF = new DecimalFormat("#.#");

DF.setRoundingMode(RoundingMode.FLOOR);

String DTS = DF.format(DT);

DT = Double.parseDouble(DTS);

D.setTickUnit(new NumberTickUnit(DT));

Double RT = (R.getUpperBound() - R.getLowerBound())/5;

String RTS = DF.format(RT);

RT = Double.parseDouble(RTS);

R.setTickUnit(new NumberTickUnit(RT));

//Plot customization

plotAD.setOutlinePaint(Color.BLACK);

plotAD.setOutlineStroke(new BasicStroke(0.5f));

plotAD.setRenderer(rendererAD);

plotAD.setBackgroundPaint(Color.WHITE);

plotAD.setRangeGridlinesVisible(true);

plotAD.setRangeGridlinePaint(Color.GRAY);

plotAD.setDomainGridlinesVisible(true);

plotAD.setDomainGridlinePaint(Color.GRAY);

//Creating ChartPanel

ChartPanel linePanelAD = new ChartPanel(lineChartAD, true, true, false, false, true);

linePanelAD.setMouseZoomable(false);

//Adding the ChartPanel to the JPanel 

panelChartRMA4D.removeAll();

panelChartRMA4D.add(linePanelAD, BorderLayout.CENTER);

panelChartRMA4D.setVisible(true);

panelChartRMA4D.setBorder(new LineBorder (Color.BLACK));

panelChartRMA4D.validate();