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问题描述
我有一个包含大量数据(> 100)或(> 1000)的图表。以下是JFreeChart现在如何打印图形。
只有11个数据点,每个人的名字应该出现在x轴上,但是有椭圆形。是否有打印大量数据的理想方式?
public void barchartResults(ArrayList< Person> results,String testName ){
int i;
setLayout(new FlowLayout(FlowLayout.LEFT,20,20));
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
String test = results.get(0).getTrait();
for(i = 0; i< results.size(); i ++){//迭代直到结果数组的末尾
dataset.setValue(results.get i).getScore(),results.get(i).getTrait(),results.get(i).getName());
}
JFreeChart chart = ChartFactory.createBarChart3D(testName +:+ test,
Examinees,Score,dataset,PlotOrientation.VERTICAL,true,true,假);
ChartPanel chartPanel =新ChartPanel(图表,W,H,W,H,W,H,假,真,真,真,真);
chart.setBorderVisible(true);
chartPanel.setSpaceBetweenGroupsOfBars(1);
this.add(chartPanel);
revalidate();
repaint();
}
解决方案
一些选项:
$ b
-
在您的域轴上调用
setVerticalTickLabels()
,如。 -
调用
setCategoryLabelPositions()
与所需的角度,如和。 -
使用
SlidingCategoryDataset
,如所示和中。
I have a graph with a lot of data (>100) or (>1000). Here's how JFreeChart prints the graph now.
There are only 11 data points, and each person's name should appear on the x axis, but there are ellipses in place. Is there an ideal way to print large numbers of data like this?
public void barchartResults(ArrayList<Person> results, String testName) {
int i;
setLayout(new FlowLayout(FlowLayout.LEFT, 20, 20));
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
String test = results.get(0).getTrait();
for (i = 0; i < results.size(); i ++) { // Iterate until the end of the results array
dataset.setValue(results.get(i).getScore(), results.get(i).getTrait(), results.get(i).getName());
}
JFreeChart chart = ChartFactory.createBarChart3D( testName + ": " + test,
"Examinees", "Score", dataset, PlotOrientation.VERTICAL, true, true, false );
ChartPanel chartPanel = new ChartPanel(chart, W, H, W, H, W, H, false, true, true, true, true, true);
chart.setBorderVisible(true);
chartPanel.setSpaceBetweenGroupsOfBars(1);
this.add(chartPanel);
revalidate();
repaint();
}
解决方案
Some options:
Invoke
setVerticalTickLabels()
on your domain axis, as shown here.Invoke
setCategoryLabelPositions()
with the desired angle, as shown here and here.
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