Product comparison visualization

Core Value of Product Comparison Visualization

Product comparison visualization helps users quickly identify key advantages and disadvantages by intuitively displaying parameter differences between products through graphical representations. ECharts, as a powerful data visualization library, offers rich chart types and interactive features, making it particularly suitable for implementing dynamic, multi-dimensional product comparison scenarios.

Basic Comparison Chart Implementation

Bar Chart Comparison

The most basic comparison method is to display numerical indicators of different products using side-by-side bar charts:

option = {
  title: { text: 'Smartphone Parameter Comparison' },
  tooltip: {},
  legend: { data: ['iPhone 15', 'Xiaomi 14'] },
  xAxis: {
    data: ['Screen Size', 'Battery Capacity', 'Camera Pixels', 'RAM']
  },
  yAxis: {},
  series: [
    {
      name: 'iPhone 15',
      type: 'bar',
      data: [6.1, 3349, 4800, 6]
    },
    {
      name: 'Xiaomi 14',
      type: 'bar',
      data: [6.36, 4610, 5000, 12]
    }
  ]
};

Radar Chart Multi-Dimensional Comparison

When comparing multiple dimensions, radar charts provide a more comprehensive display of product features:

option = {
  title: { text: 'Automotive Performance Comparison' },
  radar: {
    indicator: [
      { name: 'Power', max: 100 },
      { name: 'Comfort', max: 100 },
      { name: 'Safety', max: 100 },
      { name: 'Fuel Efficiency', max: 100 },
      { name: 'Space', max: 100 }
    ]
  },
  series: [{
    type: 'radar',
    data: [
      {
        value: [85, 90, 95, 70, 80],
        name: 'Model A'
      },
      {
        value: [95, 80, 85, 75, 70],
        name: 'Model B'
      }
    ]
  }]
};

Advanced Comparison Techniques

Parallel Coordinate System Comparison

For comparisons involving more than five dimensions, parallel coordinates are a better choice:

option = {
  parallelAxis: [
    { dim: 0, name: 'CPU Cores' },
    { dim: 1, name: 'GPU Frequency' },
    { dim: 2, name: 'Memory Bandwidth' },
    { dim: 3, name: 'Storage Speed' },
    { dim: 4, name: 'Thermal Performance' },
    { dim: 5, name: 'Price Index' }
  ],
  series: {
    type: 'parallel',
    data: [
      [8, 1800, 256, 3500, 85, 1200],
      [12, 2100, 320, 7000, 75, 1800],
      [16, 2400, 512, 12000, 65, 2500]
    ]
  }
};

Heatmap Matrix Comparison

For comparing multiple products across multiple metrics, a heatmap format can be used:

const products = ['Laptop A', 'Laptop B', 'Laptop C'];
const metrics = ['Weight', 'Battery Life', 'Performance', 'Display', 'Expandability'];
const data = [
  [1.2, 8, 85, 90, 70],
  [1.5, 12, 75, 85, 90],
  [2.1, 15, 65, 80, 85]
];

option = {
  tooltip: { position: 'top' },
  grid: { left: '10%' },
  xAxis: { type: 'category', data: metrics },
  yAxis: { type: 'category', data: products },
  visualMap: {
    min: 0,
    max: 100,
    calculable: true,
    orient: 'horizontal',
    left: 'center'
  },
  series: [{
    type: 'heatmap',
    data: data.flatMap((row, i) => 
      row.map((value, j) => [j, i, value])
    ),
    label: { show: true }
  }]
};

Interactive Enhancement Design

Dynamic Filter Comparison

Implement dynamic comparisons by adding data filtering components:

option = {
  dataset: {
    dimensions: ['product', 'price', 'rating', 'sales'],
    source: [
      ['A', 299, 4.5, 1200],
      ['B', 399, 4.2, 800],
      ['C', 199, 4.0, 1500],
      ['D', 499, 4.8, 600]
    ]
  },
  toolbox: {
    feature: {
      dataZoom: { yAxisIndex: 'none' },
      magicType: { type: ['line', 'bar'] },
      restore: {}
    }
  },
  tooltip: { trigger: 'axis' },
  xAxis: { type: 'category' },
  yAxis: {},
  series: [{ type: 'bar' }, { type: 'bar' }]
};

Linked Comparison Views

Achieve comprehensive comparisons through multi-chart linkage:

// Main comparison chart
const mainChart = echarts.init(document.getElementById('main'));
mainChart.setOption({
  // ...Bar chart configuration
  brush: {
    throttleType: 'debounce',
    throttleDelay: 300,
    toolbox: ['rect', 'keep', 'clear']
  }
});

// Detail chart
const detailChart = echarts.init(document.getElementById('detail'));
detailChart.setOption({
  // ...Radar chart configuration
});

// Implement brush linkage
mainChart.on('brushSelected', function(params) {
  const selectedData = params.batch[0].selected[0].dataIndex;
  // Update detailChart data...
});

Performance Optimization Strategies

Large Data Volume Comparison

When comparing more than 50 products:

option = {
  dataZoom: [{
    type: 'slider',
    filterMode: 'filter'
  }],
  series: {
    type: 'scatter',
    large: true,
    symbolSize: function(data) {
      return Math.sqrt(data[2]) * 2;
    },
    data: new Array(1000).fill(0).map(() => [
      Math.random() * 100,
      Math.random() * 100,
      Math.random() * 1000
    ])
  }
};

WebGL Accelerated Rendering

For 3D product comparison scenarios:

option = {
  grid3D: {},
  xAxis3D: { type: 'value' },
  yAxis3D: { type: 'category', data: ['Size','Weight','Performance'] },
  zAxis3D: { type: 'value' },
  series: [{
    type: 'bar3D',
    shading: 'lambert',
    data: [
      [10, 0, 5],
      [15, 0, 8],
      [12, 1, 6],
      // ...More data
    ],
    emphasis: {
      itemStyle: { color: '#ddb310' }
    }
  }]
};

Mobile Adaptation Solutions

Responsive Layout Implementation

Optimize comparison views for mobile devices:

function resizeChart() {
  const width = window.innerWidth;
  const option = {
    grid: {
      left: width < 600 ? '10%' : '15%',
      right: width < 600 ? '5%' : '10%'
    },
    legend: {
      orient: width < 600 ? 'horizontal' : 'vertical',
      top: width < 600 ? 'bottom' : 'middle'
    }
  };
  myChart.setOption(option);
}

window.addEventListener('resize', resizeChart);

Touch Interaction Optimization

Enhance mobile touch experience:

option = {
  // ...Basic configuration
  touch: {
    pan: true,
    zoom: true,
    rotate: true
  },
  series: {
    // ...Series configuration
    progressive: 200,
    progressiveThreshold: 1000
  }
};

Real-Time Data Updates

Dynamic Data Comparison

Implement real-time data comparison display:

function fetchData() {
  // Simulate API request
  return Promise.resolve({
    products: ['X', 'Y', 'Z'],
    metrics: ['QPS', 'Latency', 'Error'],
    values: [
      [1200, 35, 0.2],
      [800, 50, 0.5],
      [1500, 25, 0.1]
    ]
  });
}

setInterval(() => {
  fetchData().then(data => {
    myChart.setOption({
      dataset: { source: data.values },
      xAxis: { data: data.metrics },
      series: data.products.map(name => ({
        name,
        type: 'line'
      }))
    });
  });
}, 5000);

Accessibility Support

Screen Reader Adaptation

Ensure accessibility for visually impaired users:

option = {
  aria: {
    enabled: true,
    description: 'Comparison chart of three smartphone main parameters',
    label: {
      description: '{product}\'s {metric} value is {value}'
    }
  },
  // ...Other configurations
};

High Contrast Mode

Provide accessible color schemes:

option = {
  color: ['#003f5c', '#58508d', '#bc5090'],
  backgroundColor: '#f8f9fa',
  textStyle: {
    color: '#212529',
    fontFamily: 'Arial, sans-serif',
    fontSize: 14
  }
};