这行代码应该绘制图形。但这并没有策划任何事情。它只是显示轴

Question

我正在使用jjoe64 graphview库//绘制图表

GraphView graph = findViewById(R.id.plot);
graph.setVisibility(View.VISIBLE);
DataPoint[] data = new DataPoint[term];
for (int i=0;i<term;i++){
   data[i] = new DataPoint(i+1,P * java.lang.Math.pow(1 + (r) / 100, i));
}
LineGraphSeries<DataPoint> series = new LineGraphSeries<>(data);
graph.addSeries(series);

Answer 1

以下代码修复了它：

graph.removeAllSeries();
    LineGraphSeries<DataPoint> series = new LineGraphSeries<>();

    for (int i=1;i<=term;i++){
        int x=i;
        long y=Math.round(P * java.lang.Math.pow(1 + (r) / 100, i));
        series.appendData(new DataPoint(x,y),true,term);
    }

    graph.addSeries(series);