0

我使用 chart.js 3.x 有下面的图表。
https://jsfiddle.net/7oxmesnj/1/

我有以下图表配置：

var options = {
  type: 'scatter',
  data: {
    labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
    datasets: [
        {
          label: '# of Votes',
          data: [12, 19, 3, 5, 2, 3],
        borderWidth: 0,
        showLine: true,
        },  
            {
                label: '# of Points',
                data: [7, 11, 5, 8, 3, 7],
                borderWidth: 0,
        showLine: true,
            }
        ]
  },
  options: {
    scales: {
        y:{
        type: 'linear',
        min: 0,
        max: 500,
        ticks: {
          stepSize: 100,
                    reverse: false
        }
      },
      x:{
        type: 'linear',
        min: 0,
        max: 500,
        ticks: {
          stepSize: 100,
                    reverse: false
        }
      }

    }
  }
}

我无法在散点图上绘制数据。
我已经关注了迁移公会，但图表上仍然没有数据。
https://www.chartjs.org/docs/master/getting-started/v3-migration

4

2 回答 2

1

您应该将数据集更改为具有成对的数字 (x, y)。请参阅文档。

var options = {
  type: 'scatter',
  data: {
    labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
    datasets: [{
      label: '# of Votes',
      data: [{x:12,y:7}, {x:19,y:11}, {x:3,y:5}, {x:5,y:8}, {x:2,y:3}, {x:3,y:7}],
      borderWidth: 1,
      showLine: true,
      pointBackgroundColor: 'red',
      borderColor: 'blue',
      backgroundColor: 'blue',
    }]
  },
}

var ctx = document.getElementById('chartJSContainer').getContext('2d');
new Chart(ctx, options);
canvas {
  background-color: #eee;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.0.0-beta/chart.min.js"></script>

<canvas id="chartJSContainer" width="600" height="400"></canvas>

于 2020-09-09T16:40:24.657 回答
0

您的代码中的主要问题是 x 轴的定义。x 轴代表labels，它们是字符串。因此，您不能定义 numericmin和选项。maxticks.stepSize

为了获得具有给定数据的散点图，您可以将其更改type为并在每个数据集上进行'line'定义。showLine: false

请在下面查看您修改后的代码。我改变了你

var options = {
  type: 'line',
  data: {
    labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
    datasets: [{
        label: '# of Votes',
        data: [12, 19, 3, 5, 2, 3],
        fill: false,
        showLine: false
      },
      {
        label: '# of Points',
        data: [7, 11, 5, 8, 3, 7],
        fill: false,
        showLine: false
      }
    ]
  },
  options: {
    scales: {
      y: {
        min: 0,
        max: 50,
        ticks: {
          stepSize: 10
        }
      }
    }
  }
};

new Chart('chartJSContainer', options);
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.0.0-beta/chart.min.js"></script>
<canvas id="chartJSContainer"></canvas>

于 2020-09-09T17:50:39.723 回答