在MPAndroidChart中将多个图表绘制在一个图表中

Question

我必须在一个图中绘制两个不同的数据集.

数据集-1

    String[] xAxisOne = new String[] {
            "0", "1", "2", "3", "4", "5", "6"
    };

    float[] dataInput = {
            1f, 2f, 3f, 4f, 5f, 6f, 7f
    };

数据集-2

    String[] xAxisTwo = new String[] {
            "0", "2", "4", "5", "6", "8", "9"
    };

    float[] dataIn = {
            3f, 4f, 5f, 6f, 7f, 8f, 9f
    };

在上面的数据中,DataSet-1是创建图表的参考.DataSet-2必须与不同的X值集{xAxisTwo}一起绘制.

在现有的实现中,前6个值{dataInput}被绘制,接下来的6个值{dataIn}被参考xAxisOne,如何根据需要绘制.

Answer 1

您可以使用LineChart并统一xAxis并忽略每个数据集的"null"点.请参阅以下代码:

//float[] dataInput = {
//      1f, 2f, 3f, 4f, 5f, 6f, 7f
//};

//values for datainput Dataset1 at your axisone positions
ArrayList<Entry> dataset1 = new ArrayList<Entry>();
dataset1.add(new Entry(1f, 0));
dataset1.add(new Entry(2f, 1));
dataset1.add(new Entry(3f, 2));
dataset1.add(new Entry(4f, 3));
dataset1.add(new Entry(5f, 4));
dataset1.add(new Entry(6f, 5));
dataset1.add(new Entry(7f, 6));

//float[] dataIn = {
//      3f, 4f, 5f, 6f, 7f, 8f, 9f
//};

//values for datainput Dataset2 at your axisone positions
ArrayList<Entry> dataset2 = new ArrayList<Entry>();
dataset2.add(new Entry(3f, 0));
dataset2.add(new Entry(4f, 2));
dataset2.add(new Entry(5f, 4));
dataset2.add(new Entry(6f, 5));
dataset2.add(new Entry(7f, 6));
dataset2.add(new Entry(8f, 7));
dataset2.add(new Entry(9f, 8));

//String[] xAxisOne = new String[] {
//      "0", "1", "2", "3", "4", "5", "6"
//};

///String[] xAxisTwo = new String[] {
///     "0", "2", "4", "5", "6", "8", "9"
///};


// Union from xAxisOne and xAxisTwo
String[] xAxis = new String[] {"0", "1", "2", "3", "4", "5", "6", "8", "9"};


ArrayList<LineDataSet> lines = new ArrayList<LineDataSet> ();

LineDataSet lDataSet1 = new LineDataSet(dataset1, "DataSet1");
lDataSet1.setColor(Color.RED);
lDataSet1.setCircleColor(Color.RED);
lines.add(lDataSet1);
lines.add(new LineDataSet(dataset2, "DataSet2"));

LineChart chart = (LineChart) getView().findViewById(R.id.chart);
chart.setData(new LineData(xAxis, lines));

最终结果将是:

看起来数据集1的红线比蓝线多2个点.如果数据集1只有这两个点(位置1和3),如下所示:

ArrayList<Entry> dataset1 = new ArrayList<Entry>();
    dataset1.add(new Entry(2f, 1));
    dataset1.add(new Entry(4f, 3));

这将是结果: