Question 74036 in Reactjs Question posted in
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ChartJS not rendering lines according to x-axis data – Reactjs

Data:

const data={
  "labels": [
    0,  
    400,
      800,
      1200,
      1600,
      2000,
      2400,
      2800,
      3200,
      3600,
      4000
  ],
  "datasets": [
    {
      "axis": 'x',
      "label": "FFF",
      "borderColor": "Red",
      "backgroundColor": "Red",
      "data": [
          {
              "x": 2883,
              "y": 129
          },
          {
              "x": 3509,
              "y": 118
          },
          {
              "x": 3916,
              "y": 73
          }
      ]
  }
  ]
};

Chart:
enter image description here

I am providing both x & y axis values, the result should be like this for red line.
But for current config it rendering the line from start instead of specific point on x-axis.
enter image description here

Tags:

2

Answers


  1. 0

    You have to use scatter chart and showline : true option instead of line chart for this result.

    //your code

const data={
  "labels": [
    0,  
    400,
      800,
      1200,
      1600,
      2000,
      2400,
      2800,
      3200,
      3600,
      4000
  ],
  "datasets": [
    {
      "axis": 'x',
      "label": "FFF",
      "borderColor": "Red",
      "backgroundColor": "Red",
      "showLine": true,         //add this option to connect dots of scatterred points
      "data": [
          {
              "x": 2883,
              "y": 129
          },
          {
              "x": 3509,
              "y": 118
          },
          {
              "x": 3916,
              "y": 73
          }
      ]
  }
  ]
};

<Scatter data={data} />
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  2. 0

    This is because you are using a line chart with default config.

    By default a line chart uses a category scale and expects strings. In the dataset you specify an x, this x is the internal data format which for the catagory scale is not the value but the index.

    The easyest approach would be to use a linear scale by setting options.scales.x.type to 'linear'

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