如何按添加顺序绘制X,Y坐标? [英] How can I plot X,Y coordinates by added order?
问题描述
我想按输入的顺序将X和Y坐标连接成一个圆.
I want to connect X and Y coordinates by order which I inputed to make a circle .
我找到了一个用Java绘制X,Y坐标的程序. 然后我添加了我的圆数据,但是程序连接的最近的X,Y坐标未排序X,Y.
I found a program that draw X,Y coordinates in Java . Then I added my data of circle but program connected nearest X,Y coordinates not ordered X,Y .
public Graph(final String title) {
super(title);
final XYSeries series = new XYSeries("Random Data");
series.add(2.000 , 0);
series.add(0 , 2.000);
series.add(-2.000 , 0);
series.add(0 , -2.000);
final XYSeriesCollection data = new XYSeriesCollection(series);
final JFreeChart chart = ChartFactory.createXYLineChart(
"XY Series Demo",
"X",
"Y",
data,
PlotOrientation.VERTICAL,
true,
true,
false
);
我期望结果以正方形图表示.
I expected results as square diagram .
推荐答案
The XYSeries
API specifies,
默认情况下,系列中的项目将按x值升序排列,并且允许重复使用x值.
By default, items in the series will be sorted into ascending order by x-value, and duplicate x-values are permitted.
您可以使用适当的构造函数来克服它,建议此处:
You can defeat this with the appropriate constructor, suggested here:
final XYSeries series = new XYSeries("Random Data", false);
在下图中,我添加了一个额外的数据点以关闭该图:
In the illustration below, I've added an extra data point to close the figure:
对于任意形状,也请考虑一个XYShapeAnnotation
,请参见此处.
For arbitrary shapes, also consider an XYShapeAnnotation
, seen here.
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