Charts ChartJS：映射非数值Y和X

我试图映射非数值的y和x，但由于某些原因，它不起作用

例如

当我尝试改变时：

data: ['Request Added', 'Request Viewed']

与

图表没有显示任何东西

我还尝试使用scales.yAxis.ticks.callback修改并映射数组，但也没有成功

[0: 'Request Added', 1: 'Request Viewed']

编辑：基本上我需要这样的东西

Request Added           x           x
Request Viewed                 x
Request Accepted               x    x
                    January, Feb, March

基本上是一个副本：

---

这也建议映射到一个数组，但是Y-ticks中的回调没有什么奇怪的意义？当我添加

labelY:[1,2,3,4,5,6]

时，回调“values”的第三个参数等于

[-2-1 0 1 2]

要对X轴和Y轴使用类别比例，必须使用值数组的传统数据格式。根据

散点图可以通过将X轴更改为线性轴来创建。要使用散点图，数据必须作为包含X和Y属性的对象传递

这意味着您只能在至少x轴是线性比例的情况下使用数据格式

{x:''，y:''}

（但我打赌它只有在x轴和y轴都是线性的情况下才有效）

由于您仅限于为数据使用一个值数组，因此必须至少使用2个数据集才能在X轴上绘制多个值（就像您正在尝试的那样）

下面是一个图表配置，它给出了您要查找的内容

var ctx = document.getElementById("canvas").getContext("2d");
var myLine = new Chart(ctx, {
  type: 'line',
  data: {
    xLabels: ["January", "February", "March", "April", "May", "June", "July"],
    yLabels: ['Request Added', 'Request Viewed', 'Request Accepted', 'Request Solved', 'Solving Confirmed'],
    datasets: [{
      label: "My First dataset",
      data: ['Request Added', 'Request Viewed', 'Request Added'],
      fill: false,
      showLine: false,
      borderColor: chartColors.red,
      backgroundColor: chartColors.red
    }, {
      label: "My First dataset",
      data: [null, 'Request Accepted', 'Request Accepted'],
      fill: false,
      showLine: false,
      borderColor: chartColors.red,
      backgroundColor: chartColors.red
    }]
  },
  options: {
    responsive: true,
    title:{
      display: true,
      text: 'Chart.js - Non Numeric X and Y Axis'
    },
    legend: {
      display: false
    },
    scales: {
      xAxes: [{
        display: true,
        scaleLabel: {
          display: true,
          labelString: 'Month'
        }
      }],
      yAxes: [{
        type: 'category',
        position: 'left',
        display: true,
        scaleLabel: {
          display: true,
          labelString: 'Request State'
        },
        ticks: {
          reverse: true
        },
      }]
    }
  }
});

你可以从这里看到它是什么样子

如果出于任何原因而使用

{x:''，y:''}

数据格式，则必须将两种比例更改为线性，将数据映射为数值，然后使用属性将数值记号映射回字符串值

下面是一个演示此方法的示例

var xMap = ["January", "February", "March", "April", "May", "June", "July"];
var yMap = ['Request Added', 'Request Viewed', 'Request Accepted', 'Request Solved', 'Solving Confirmed'];

var mapDataPoint = function(xValue, yValue) {
  return {
    x: xMap.indexOf(xValue),
    y: yMap.indexOf(yValue)
  };
};

var ctx2 = document.getElementById("canvas2").getContext("2d");
var myLine2 = new Chart(ctx2, {
  type: 'line',
  data: {
    datasets: [{
      label: "My First dataset",
      data: [
        mapDataPoint("January", "Request Added"),
        mapDataPoint("February", "Request Viewed"),
        mapDataPoint("February", "Request Accepted"),
        mapDataPoint("March", "Request Added"),
        mapDataPoint("March", "Request Accepted"),
      ],
      fill: false,
      showLine: false,
      borderColor: chartColors.red,
      backgroundColor: chartColors.red
    }]
  },
  options: {
    responsive: true,
    title: {
      display: true,
      text: 'Chart.js - Scatter Chart Mapping X and Y to Non Numeric'
    },
    legend: {
      display: false
    },
    scales: {
      xAxes: [{
        type: 'linear',
        position: 'bottom',
        scaleLabel: {
          display: true,
          labelString: 'Month'
        },
        ticks: {
          min: 0,
          max: xMap.length - 1,
          callback: function(value) {
            return xMap[value];
          },
        },
      }],
      yAxes: [{
        scaleLabel: {
          display: true,
          labelString: 'Request State'
        },
        ticks: {
          reverse: true,
          min: 0,
          max: yMap.length - 1,
          callback: function(value) {
            return yMap[value];
          },
        },
      }]
    }
  }
});

---

同时，你也可以看到这一点。

你能展示一下你的努力吗？用示例/non-numeric-y.html/在本地展示了吗。我尝试了各种各样的变化，然后把它们藏起来

var ctx = document.getElementById("canvas").getContext("2d");
var myLine = new Chart(ctx, {
  type: 'line',
  data: {
    xLabels: ["January", "February", "March", "April", "May", "June", "July"],
    yLabels: ['Request Added', 'Request Viewed', 'Request Accepted', 'Request Solved', 'Solving Confirmed'],
    datasets: [{
      label: "My First dataset",
      data: ['Request Added', 'Request Viewed', 'Request Added'],
      fill: false,
      showLine: false,
      borderColor: chartColors.red,
      backgroundColor: chartColors.red
    }, {
      label: "My First dataset",
      data: [null, 'Request Accepted', 'Request Accepted'],
      fill: false,
      showLine: false,
      borderColor: chartColors.red,
      backgroundColor: chartColors.red
    }]
  },
  options: {
    responsive: true,
    title:{
      display: true,
      text: 'Chart.js - Non Numeric X and Y Axis'
    },
    legend: {
      display: false
    },
    scales: {
      xAxes: [{
        display: true,
        scaleLabel: {
          display: true,
          labelString: 'Month'
        }
      }],
      yAxes: [{
        type: 'category',
        position: 'left',
        display: true,
        scaleLabel: {
          display: true,
          labelString: 'Request State'
        },
        ticks: {
          reverse: true
        },
      }]
    }
  }
});

var xMap = ["January", "February", "March", "April", "May", "June", "July"];
var yMap = ['Request Added', 'Request Viewed', 'Request Accepted', 'Request Solved', 'Solving Confirmed'];

var mapDataPoint = function(xValue, yValue) {
  return {
    x: xMap.indexOf(xValue),
    y: yMap.indexOf(yValue)
  };
};

var ctx2 = document.getElementById("canvas2").getContext("2d");
var myLine2 = new Chart(ctx2, {
  type: 'line',
  data: {
    datasets: [{
      label: "My First dataset",
      data: [
        mapDataPoint("January", "Request Added"),
        mapDataPoint("February", "Request Viewed"),
        mapDataPoint("February", "Request Accepted"),
        mapDataPoint("March", "Request Added"),
        mapDataPoint("March", "Request Accepted"),
      ],
      fill: false,
      showLine: false,
      borderColor: chartColors.red,
      backgroundColor: chartColors.red
    }]
  },
  options: {
    responsive: true,
    title: {
      display: true,
      text: 'Chart.js - Scatter Chart Mapping X and Y to Non Numeric'
    },
    legend: {
      display: false
    },
    scales: {
      xAxes: [{
        type: 'linear',
        position: 'bottom',
        scaleLabel: {
          display: true,
          labelString: 'Month'
        },
        ticks: {
          min: 0,
          max: xMap.length - 1,
          callback: function(value) {
            return xMap[value];
          },
        },
      }],
      yAxes: [{
        scaleLabel: {
          display: true,
          labelString: 'Request State'
        },
        ticks: {
          reverse: true,
          min: 0,
          max: yMap.length - 1,
          callback: function(value) {
            return yMap[value];
          },
        },
      }]
    }
  }
});