Angular chart.js隐藏1个数据集上的点

npm install chart.js ng2-charts --save

import { NgModule } from '@angular/core';
import { ChartsModule } from 'ng2-charts';

@NgModule({
  imports: [
    ChartsModule
  ]
})
export class AppModule { }

<canvas baseChart
        [datasets]="chartData"
        [labels]="chartLabels"
        [options]="chartOptions"
        [legend]="chartLegend"
        [chartType]="chartType"></canvas>

import { Component } from '@angular/core';

@Component({
  selector: 'app-chart',
  templateUrl: './chart.component.html',
  styleUrls: ['./chart.component.css']
})
export class ChartComponent {
  public chartData = [
    { data: [65, 59, 80, 81, 56, 55, 40], label: '数据集1' },
    { data: [28, 48, 40, 19, 86, 27, 90], label: '数据集2' }
  ];
  public chartLabels = ['标签1', '标签2', '标签3', '标签4', '标签5', '标签6', '标签7'];
  public chartOptions = {
    scales: {
      yAxes: [{
        ticks: {
          beginAtZero: true
        }
      }]
    }
  };
  public chartLegend = true;
  public chartType = 'line';
}

public chartOptions = {
  scales: {
    yAxes: [{
      ticks: {
        beginAtZero: true
      }
    }]
  },
  elements: {
    point: {
      radius: [0, 5] // 第一个数据集的点半径为0，第二个数据集的点半径为5
    }
  }
};