在MPAndroidChart中在一个图中绘制多个图表

Question

我必须在一个图中绘制两个不同的dataSets。

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
    };

在上述数据中，DataSet-1是创建图形的引用。DataSet-2必须用不同的X值{xAxisTwo}以相同的方式绘制.

在现有实现中，绘制前6个值{dataInput}，并参照xAxisOne绘制接下来的6个值{dataIn}，如何根据需要绘制。

Answer 1

您可以使用LineChart和统一xAxis并忽略每个数据集的"null“点来完成此操作。见下面的代码：

//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dataset1的红线比蓝线多出两个点。如果dataset1只有这两点(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));

其结果是：

​

​

Answer 2

这需要从第3版开始更新：

对于多行，需要多个数据集。假设您已经创建了两个数据集。

LineDataSet dataSetReported = new LineDataSet(entriesReported, "Reported");
LineDataSet dataSetCalculated = new LineDataSet(entriesCalculated, "Calculated");

您需要一个ILINEDATASET列表来容纳所创建的两个数据集。只需创建一个列表并添加数据集。

List<ILineDataSet> lines = new ArrayList<ILineDataSet>();
lines.add(dataSetReported);
lines.add(dataSetCalculated);

在图表上显示为：

LineData data = new LineData(lines);
chart.setData(data);
chart.invalidate();

有关原始作者的文档，请参阅这里。

Answer 3

可以使用此行图传递多个数据集

LineChart lineChart1 = (LineChart) findViewById(R.id.chart1);

    ArrayList<Entry> entries = new ArrayList<>();
    entries.add(new Entry(4f, 0));
    entries.add(new Entry(8f, 1));
    entries.add(new Entry(6f, 2));
    entries.add(new Entry(10f, 3));
    entries.add(new Entry(18f, 4));
    entries.add(new Entry(9f, 5));

    ArrayList<Entry> entry = new ArrayList<>();
    entry.add(new Entry(3f, 0));
    entry.add(new Entry(10f, 1));
    entry.add(new Entry(4f, 2));
    entry.add(new Entry(14f, 3));
    entry.add(new Entry(12f, 4));
    entry.add(new Entry(5f, 5));
    ArrayList<LineDataSet> lines = new ArrayList<LineDataSet> ();
    String[] xAxis = new String[] {"1", "2", "3", "4", "5","6"};
    LineDataSet lDataSet1 = new LineDataSet(entries, "DataSet1");
    lDataSet1.setDrawFilled(true);
    lines.add(lDataSet1);

    LineDataSet lDataSet2 = new LineDataSet(entry, "DataSet2");
    lDataSet2.setDrawFilled(true);
    lines.add(lDataSet2);

    lineChart1.setData(new LineData(xAxis, lines));
    lineChart1.animateY(5000);
}