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class="nav-item"><a href="/handbook/zh/how-to/cross-platform/baidu-app" class="nav-link"><span class="title">百度智能小程序</span></a> <ul class="nav bd-sidenav level3" style="display:none"></ul></li></ul></li><li class="nav-item"><a class="nav-link"><span class="title">数据处理</span> <span class="glyphicon glyphicon-menu-down"></span></a> <ul class="nav bd-sidenav level2" style="display:none"><li class="nav-item"><a href="/handbook/zh/how-to/data/dynamic-data" class="nav-link"><span class="title">动态的异步数据</span></a> <ul class="nav bd-sidenav level3" style="display:none"></ul></li><!----></ul></li><li class="nav-item"><a class="nav-link"><span class="title">标签</span> <span class="glyphicon glyphicon-menu-down"></span></a> <ul class="nav bd-sidenav level2" style="display:none"><li class="nav-item"><a href="/handbook/zh/how-to/label/rich-text" class="nav-link"><span class="title">富文本标签</span></a> <ul class="nav bd-sidenav level3" style="display:none"></ul></li></ul></li><li class="nav-item"><a class="nav-link"><span class="title">动画</span> <span class="glyphicon glyphicon-menu-down"></span></a> <ul class="nav bd-sidenav level2" style="display:none"><li class="nav-item"><a href="/handbook/zh/how-to/animation/transition" class="nav-link"><span class="title">数据过渡动画</span></a> <ul class="nav bd-sidenav level3" style="display:none"></ul></li></ul></li><li class="nav-item"><a class="nav-link"><span class="title">交互</span> <span class="glyphicon glyphicon-menu-down"></span></a> <ul class="nav bd-sidenav level2" style="display:none"><li class="nav-item"><a href="/handbook/zh/how-to/interaction/drag" class="nav-link"><span class="title">拖拽的实现</span></a> <ul class="nav bd-sidenav level3" style="display:none"></ul></li><!----></ul></li></ul></li><li class="nav-item"><div class="nav-link"><span class="title">最佳实践</span></div> <ul class="nav bd-sidenav level1"><!----><li class="nav-item"><a href="/handbook/zh/best-practices/canvas-vs-svg" class="nav-link"><span class="title">Canvas vs. SVG</span></a> <ul class="nav bd-sidenav level2" style="display:none"></ul></li><li class="nav-item"><a href="/handbook/zh/best-practices/aria" class="nav-link"><span class="title">无障碍访问</span></a> <ul class="nav bd-sidenav level2" style="display:none"></ul></li></ul></li><li class="nav-item"><div class="nav-link"><span class="title">编辑本文档</span></div> <ul class="nav bd-sidenav level1"><li class="nav-item"><a href="/handbook/zh/meta/edit-guide" class="nav-link"><span class="title">文档编辑指南</span></a> <ul class="nav bd-sidenav level2" style="display:none"></ul></li></ul></li></ul></div> <div class="open-sidebar"><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7"></path></svg></div></div> <div class="bd-content col-sm-7 pl-sm-2 col-12"><div class="post-content content"><div><div class="post-inner"><!----> <div class="nuxt-content"><article><h1 id="%E5%9F%BA%E7%A1%80%E6%8A%98%E7%BA%BF%E5%9B%BE" tabindex="-1">基础折线图</h1> <p>折线图主要用来展示数据项随着时间推移的趋势或变化。</p> <h2 id="%E6%9C%80%E7%AE%80%E5%8D%95%E7%9A%84%E6%8A%98%E7%BA%BF%E5%9B%BE" tabindex="-1">最简单的折线图</h2> <p>如果我们想建立一个横坐标是类目型（category）、纵坐标是数值型（value）的折线图，我们可以使用这样的方式：</p> <div class="md-live layout-tb"><div class="md-live-editor"><div class="md-live-editor-container"><div class="prism-editor-wrapper"><div class="prism-editor__container"><textarea spellcheck="false" autocapitalize="off" autocomplete="off" autocorrect="off" data-gramm="false" placeholder="" data-testid="textarea" class="prism-editor__textarea">option = {
  xAxis: {
    type: 'category',
    data: ['A', 'B', 'C']
  },
  yAxis: {
    type: 'value'
  },
  series: [
    {
      data: [120, 200, 150],
      type: 'line'
    }
  ]
};</textarea><pre data-testid="preview" class="prism-editor__editor">option <span class="token operator">=</span> <span class="token punctuation">{</span>
  xAxis<span class="token operator">:</span> <span class="token punctuation">{</span>
    type<span class="token operator">:</span> <span class="token string">'category'</span><span class="token punctuation">,</span>
    data<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token string">'A'</span><span class="token punctuation">,</span> <span class="token string">'B'</span><span class="token punctuation">,</span> <span class="token string">'C'</span><span class="token punctuation">]</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
  yAxis<span class="token operator">:</span> <span class="token punctuation">{</span>
    type<span class="token operator">:</span> <span class="token string">'value'</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
  series<span class="token operator">:</span> <span class="token punctuation">[</span>
    <span class="token punctuation">{</span>
      data<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token number">120</span><span class="token punctuation">,</span> <span class="token number">200</span><span class="token punctuation">,</span> <span class="token number">150</span><span class="token punctuation">]</span><span class="token punctuation">,</span>
      type<span class="token operator">:</span> <span class="token string">'line'</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">]</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span><br></pre></div></div></div> <div class="md-live-tag">live</div> <div class="clipboard" data-v-479657ca><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6" data-v-479657ca><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6" data-v-479657ca><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 5H6a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2v-1M8 5a2 2 0 002 2h2a2 2 0 002-2M8 5a2 2 0 012-2h2a2 2 0 012 2m0 0h2a2 2 0 012 2v3m2 4H10m0 0l3-3m-3 3l3 3" data-v-479657ca></path></svg></svg></div></div> <div class="md-live-preview"></div></div> <p>在这个例子中，我们通过 <code>xAxis</code> 将横坐标设为类目型，并指定了对应的值；通过 <code>type</code> 将 <code>yAxis</code> 的类型设定为数值型。在 <code>series</code> 中，我们将系列类型设为 <code>line</code>，并且通过 <code>data</code> 指定了折线图三个点的取值。这样，就能得到一个最简单的折线图了。</p> <blockquote><p>这里 <code>xAxis</code> 和 <code>yAxis</code> 的 <code>type</code> 属性都可以隐去不写。因为坐标轴的默认类型是数值型，而 <code>xAxis</code> 指定了类目型的 <code>data</code>，所以 <code>ECharts</code> 也能识别出这是类目型的坐标轴。为了让大家更容易理解，我们特意写了 <code>type</code>。在实际的应用中，如果是 <code>'value'</code> 类型，也可以省略不写。</p></blockquote> <h2 id="%E7%AC%9B%E5%8D%A1%E5%B0%94%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%E7%9A%84%E6%8A%98%E7%BA%BF%E5%9B%BE" tabindex="-1">笛卡尔坐标系中的折线图</h2> <p>如果我们希望折线图在横坐标和纵坐标上都是连续的，即在笛卡尔坐标系中，应该如何实现呢？答案也很简单，只要把 <code>series</code> 的 <code>data</code> 每个数据用一个包含两个元素的数组表示就行了。</p> <div class="md-live layout-tb"><div class="md-live-editor"><div class="md-live-editor-container"><div class="prism-editor-wrapper"><div class="prism-editor__container"><textarea spellcheck="false" autocapitalize="off" autocomplete="off" autocorrect="off" data-gramm="false" placeholder="" data-testid="textarea" class="prism-editor__textarea">option = {
  xAxis: {},
  yAxis: {},
  series: [
    {
      data: [
        [20, 120],
        [50, 200],
        [40, 50]
      ],
      type: 'line'
    }
  ]
};</textarea><pre data-testid="preview" class="prism-editor__editor">option <span class="token operator">=</span> <span class="token punctuation">{</span>
  xAxis<span class="token operator">:</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
  yAxis<span class="token operator">:</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
  series<span class="token operator">:</span> <span class="token punctuation">[</span>
    <span class="token punctuation">{</span>
      data<span class="token operator">:</span> <span class="token punctuation">[</span>
        <span class="token punctuation">[</span><span class="token number">20</span><span class="token punctuation">,</span> <span class="token number">120</span><span class="token punctuation">]</span><span class="token punctuation">,</span>
        <span class="token punctuation">[</span><span class="token number">50</span><span class="token punctuation">,</span> <span class="token number">200</span><span class="token punctuation">]</span><span class="token punctuation">,</span>
        <span class="token punctuation">[</span><span class="token number">40</span><span class="token punctuation">,</span> <span class="token number">50</span><span class="token punctuation">]</span>
      <span class="token punctuation">]</span><span class="token punctuation">,</span>
      type<span class="token operator">:</span> <span class="token string">'line'</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">]</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span><br></pre></div></div></div> <div class="md-live-tag">live</div> <div class="clipboard" data-v-479657ca><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6" data-v-479657ca><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6" data-v-479657ca><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 5H6a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2v-1M8 5a2 2 0 002 2h2a2 2 0 002-2M8 5a2 2 0 012-2h2a2 2 0 012 2m0 0h2a2 2 0 012 2v3m2 4H10m0 0l3-3m-3 3l3 3" data-v-479657ca></path></svg></svg></div></div> <div class="md-live-preview"></div></div> <h2 id="%E6%8A%98%E7%BA%BF%E5%9B%BE%E6%A0%B7%E5%BC%8F%E8%AE%BE%E7%BD%AE" tabindex="-1">折线图样式设置</h2> <h3 id="%E6%8A%98%E7%BA%BF%E7%9A%84%E6%A0%B7%E5%BC%8F" tabindex="-1">折线的样式</h3> <p>折线图中折线的样式可以通过 <code>lineStyle</code> 设置。可以为其指定颜色、线宽、折线类型、阴影、不透明度等等，具体的可以参考配置项手册 <a href="https://echarts.apache.org/option.html#series-line.lineStyle"><code>series.lineStyle</code></a> 了解。这里，我们以设置颜色（color）、线宽（width）和折线类型（type）为例说明。</p> <div class="md-live layout-tb"><div class="md-live-editor"><div class="md-live-editor-container"><div class="prism-editor-wrapper"><div class="prism-editor__container"><textarea spellcheck="false" autocapitalize="off" autocomplete="off" autocorrect="off" data-gramm="false" placeholder="" data-testid="textarea" class="prism-editor__textarea">option = {
  xAxis: {
    data: ['A', 'B', 'C', 'D', 'E']
  },
  yAxis: {},
  series: [
    {
      data: [10, 22, 28, 23, 19],
      type: 'line',
      lineStyle: {
        normal: {
          color: 'green',
          width: 4,
          type: 'dashed'
        }
      }
    }
  ]
};</textarea><pre data-testid="preview" class="prism-editor__editor">option <span class="token operator">=</span> <span class="token punctuation">{</span>
  xAxis<span class="token operator">:</span> <span class="token punctuation">{</span>
    data<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token string">'A'</span><span class="token punctuation">,</span> <span class="token string">'B'</span><span class="token punctuation">,</span> <span class="token string">'C'</span><span class="token punctuation">,</span> <span class="token string">'D'</span><span class="token punctuation">,</span> <span class="token string">'E'</span><span class="token punctuation">]</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
  yAxis<span class="token operator">:</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
  series<span class="token operator">:</span> <span class="token punctuation">[</span>
    <span class="token punctuation">{</span>
      data<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token number">10</span><span class="token punctuation">,</span> <span class="token number">22</span><span class="token punctuation">,</span> <span class="token number">28</span><span class="token punctuation">,</span> <span class="token number">23</span><span class="token punctuation">,</span> <span class="token number">19</span><span class="token punctuation">]</span><span class="token punctuation">,</span>
      type<span class="token operator">:</span> <span class="token string">'line'</span><span class="token punctuation">,</span>
      lineStyle<span class="token operator">:</span> <span class="token punctuation">{</span>
        normal<span class="token operator">:</span> <span class="token punctuation">{</span>
          color<span class="token operator">:</span> <span class="token string">'green'</span><span class="token punctuation">,</span>
          width<span class="token operator">:</span> <span class="token number">4</span><span class="token punctuation">,</span>
          type<span class="token operator">:</span> <span class="token string">'dashed'</span>
        <span class="token punctuation">}</span>
      <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">]</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span><br></pre></div></div></div> <div class="md-live-tag">live</div> <div class="clipboard" data-v-479657ca><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6" data-v-479657ca><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6" data-v-479657ca><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 5H6a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2v-1M8 5a2 2 0 002 2h2a2 2 0 002-2M8 5a2 2 0 012-2h2a2 2 0 012 2m0 0h2a2 2 0 012 2v3m2 4H10m0 0l3-3m-3 3l3 3" data-v-479657ca></path></svg></svg></div></div> <div class="md-live-preview"></div></div> <p>这里设置折线宽度时，数据点描边的宽度是不会跟着改变的，而应该在数据点的配置项中另外设置。</p> <h3 id="%E6%95%B0%E6%8D%AE%E7%82%B9%E7%9A%84%E6%A0%B7%E5%BC%8F" tabindex="-1">数据点的样式</h3> <p>数据点的样式可以通过 <a href="https://echarts.apache.org/option.html#series-line.itemStyle"><code>series.itemStyle</code></a> 指定填充颜色（color）、描边颜色（borderColor）、描边宽度（borderWidth）、描边类型（borderType）、阴影（shadowColor）、不透明度（opacity）等。与折线样式的设置十分相似，这里不再展开说明。</p> <h2 id="%E5%9C%A8%E6%95%B0%E6%8D%AE%E7%82%B9%E5%A4%84%E6%98%BE%E7%A4%BA%E6%95%B0%E5%80%BC" tabindex="-1">在数据点处显示数值</h2> <p>在系列中，这数据点的标签通过 <a href="https://echarts.apache.org/option.html#series-line.label"><code>series.label</code></a> 属性指定。如果将 <code>label</code> 下的 <code>show</code> 指定为<code>true</code>，则表示该数值默认时就显示；如果为 <code>false</code>，而 <a href="https://echarts.apache.org/option.html#series-line.emphasis.label.show"><code>series.emphasis.label.show</code></a> 为 <code>true</code>，则表示只有在鼠标移动到该数据时，才显示数值。</p> <div class="md-live layout-tb"><div class="md-live-editor"><div class="md-live-editor-container"><div class="prism-editor-wrapper"><div class="prism-editor__container"><textarea spellcheck="false" autocapitalize="off" autocomplete="off" autocorrect="off" data-gramm="false" placeholder="" data-testid="textarea" class="prism-editor__textarea">option = {
  xAxis: {
    data: ['A', 'B', 'C', 'D', 'E']
  },
  yAxis: {},
  series: [
    {
      data: [10, 22, 28, 23, 19],
      type: 'line',
      label: {
        show: true,
        position: 'bottom',
        textStyle: {
          fontSize: 20
        }
      }
    }
  ]
};</textarea><pre data-testid="preview" class="prism-editor__editor">option <span class="token operator">=</span> <span class="token punctuation">{</span>
  xAxis<span class="token operator">:</span> <span class="token punctuation">{</span>
    data<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token string">'A'</span><span class="token punctuation">,</span> <span class="token string">'B'</span><span class="token punctuation">,</span> <span class="token string">'C'</span><span class="token punctuation">,</span> <span class="token string">'D'</span><span class="token punctuation">,</span> <span class="token string">'E'</span><span class="token punctuation">]</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
  yAxis<span class="token operator">:</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
  series<span class="token operator">:</span> <span class="token punctuation">[</span>
    <span class="token punctuation">{</span>
      data<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token number">10</span><span class="token punctuation">,</span> <span class="token number">22</span><span class="token punctuation">,</span> <span class="token number">28</span><span class="token punctuation">,</span> <span class="token number">23</span><span class="token punctuation">,</span> <span class="token number">19</span><span class="token punctuation">]</span><span class="token punctuation">,</span>
      type<span class="token operator">:</span> <span class="token string">'line'</span><span class="token punctuation">,</span>
      label<span class="token operator">:</span> <span class="token punctuation">{</span>
        show<span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
        position<span class="token operator">:</span> <span class="token string">'bottom'</span><span class="token punctuation">,</span>
        textStyle<span class="token operator">:</span> <span class="token punctuation">{</span>
          fontSize<span class="token operator">:</span> <span class="token number">20</span>
        <span class="token punctuation">}</span>
      <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">]</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span><br></pre></div></div></div> <div class="md-live-tag">live</div> <div class="clipboard" data-v-479657ca><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6" data-v-479657ca><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6" data-v-479657ca><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 5H6a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2v-1M8 5a2 2 0 002 2h2a2 2 0 002-2M8 5a2 2 0 012-2h2a2 2 0 012 2m0 0h2a2 2 0 012 2v3m2 4H10m0 0l3-3m-3 3l3 3" data-v-479657ca></path></svg></svg></div></div> <div class="md-live-preview"></div></div> <h2 id="%E7%A9%BA%E6%95%B0%E6%8D%AE" tabindex="-1">空数据</h2> <p>在一个系列中，可能一个横坐标对应的取值是“空”的，将其设为 0 有时并不能满足我们的期望--空数据不应被其左右的数据连接。</p> <p>在 ECharts 中，我们使用字符串 <code>'-'</code> 表示空数据，这对其他系列的数据也是适用的。</p> <div class="md-live layout-tb"><div class="md-live-editor"><div class="md-live-editor-container"><div class="prism-editor-wrapper"><div class="prism-editor__container"><textarea spellcheck="false" autocapitalize="off" autocomplete="off" autocorrect="off" data-gramm="false" placeholder="" data-testid="textarea" class="prism-editor__textarea">option = {
  xAxis: {
    data: ['A', 'B', 'C', 'D', 'E']
  },
  yAxis: {},
  series: [
    {
      data: [0, 22, '-', 23, 19],
      type: 'line'
    }
  ]
};</textarea><pre data-testid="preview" class="prism-editor__editor">option <span class="token operator">=</span> <span class="token punctuation">{</span>
  xAxis<span class="token operator">:</span> <span class="token punctuation">{</span>
    data<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token string">'A'</span><span class="token punctuation">,</span> <span class="token string">'B'</span><span class="token punctuation">,</span> <span class="token string">'C'</span><span class="token punctuation">,</span> <span class="token string">'D'</span><span class="token punctuation">,</span> <span class="token string">'E'</span><span class="token punctuation">]</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
  yAxis<span class="token operator">:</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
  series<span class="token operator">:</span> <span class="token punctuation">[</span>
    <span class="token punctuation">{</span>
      data<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">22</span><span class="token punctuation">,</span> <span class="token string">'-'</span><span class="token punctuation">,</span> <span class="token number">23</span><span class="token punctuation">,</span> <span class="token number">19</span><span class="token punctuation">]</span><span class="token punctuation">,</span>
      type<span class="token operator">:</span> <span class="token string">'line'</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">]</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span><br></pre></div></div></div> <div class="md-live-tag">live</div> <div class="clipboard" data-v-479657ca><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6" data-v-479657ca><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6" data-v-479657ca><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 5H6a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2v-1M8 5a2 2 0 002 2h2a2 2 0 002-2M8 5a2 2 0 012-2h2a2 2 0 012 2m0 0h2a2 2 0 012 2v3m2 4H10m0 0l3-3m-3 3l3 3" data-v-479657ca></path></svg></svg></div></div> <div class="md-live-preview"></div></div> <blockquote><p>注意区别这个例子中，“空”数据与取值为 0 的数据。</p></blockquote></article></div></div> <div class="post-contributors"><h3><span class="inline-block align-middle">本文贡献者</span> <a target="_blank" href="https://github.com/apache/echarts-handbook/tree/master/contents/zh/how-to/chart-types/line/basic-line.md" title="编辑本文" class="inline-block align-middle text-sm"><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-8 w-8 inline-block align-middle"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z"></path></svg> <span class="inline-block align-middle">在 GitHub 上编辑本页</span></a></h3> <div class="post-contributors-list"><a href="https://github.com/pissang" target="_blank" class="post-contributor"><img alt="pissang" src="https://avatars.githubusercontent.com/pissang?size=60"> <span>pissang</span></a></div></div></div></div></div></div> <link rel="stylesheet" href="//fastly.jsdelivr.net/npm/highlight.js@9.12.0/styles/github-gist.min.css"></div></div></div></div><script>window.__NUXT__=function(i,e,t,d,r,l,a,o,n,c,s,g,C,h,A,I,B,p,E,b,w,m,f,y,u,v,S,x,D,G,L,M,R,O,z,F,k,H,V,W,J,T,Q,X,K,P,Z,j,U,Y,N,_,q,$,ii,ei,ti,di,ri){return{layout:"default",data:[{html:'<h1 id="%E5%9F%BA%E7%A1%80%E6%8A%98%E7%BA%BF%E5%9B%BE" tabindex="-1">基础折线图</h1>\n<p>折线图主要用来展示数据项随着时间推移的趋势或变化。</p>\n<h2 id="%E6%9C%80%E7%AE%80%E5%8D%95%E7%9A%84%E6%8A%98%E7%BA%BF%E5%9B%BE" tabindex="-1">最简单的折线图</h2>\n<p>如果我们想建立一个横坐标是类目型（category）、纵坐标是数值型（value）的折线图，我们可以使用这样的方式：</p>\n<md-live lang="js" code="\'b3B0aW9uID0gewogIHhBeGlzOiB7CiAgICB0eXBlOiAnY2F0ZWdvcnknLAogICAgZGF0YTogWydBJywgJ0InLCAnQyddCiAgfSwKICB5QXhpczogewogICAgdHlwZTogJ3ZhbHVlJwogIH0sCiAgc2VyaWVzOiBbCiAgICB7CiAgICAgIGRhdGE6IFsxMjAsIDIwMCwgMTUwXSwKICAgICAgdHlwZTogJ2xpbmUnCiAgICB9CiAgXQp9Ow\'" v-bind="{}" />\n<p>在这个例子中，我们通过 <code>xAxis</code> 将横坐标设为类目型，并指定了对应的值；通过 <code>type</code> 将 <code>yAxis</code> 的类型设定为数值型。在 <code>series</code> 中，我们将系列类型设为 <code>line</code>，并且通过 <code>data</code> 指定了折线图三个点的取值。这样，就能得到一个最简单的折线图了。</p>\n<blockquote>\n<p>这里 <code>xAxis</code> 和 <code>yAxis</code> 的 <code>type</code> 属性都可以隐去不写。因为坐标轴的默认类型是数值型，而 <code>xAxis</code> 指定了类目型的 <code>data</code>，所以 <code>ECharts</code> 也能识别出这是类目型的坐标轴。为了让大家更容易理解，我们特意写了 <code>type</code>。在实际的应用中，如果是 <code>\'value\'</code> 类型，也可以省略不写。</p>\n</blockquote>\n<h2 id="%E7%AC%9B%E5%8D%A1%E5%B0%94%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%E7%9A%84%E6%8A%98%E7%BA%BF%E5%9B%BE" tabindex="-1">笛卡尔坐标系中的折线图</h2>\n<p>如果我们希望折线图在横坐标和纵坐标上都是连续的，即在笛卡尔坐标系中，应该如何实现呢？答案也很简单，只要把 <code>series</code> 的 <code>data</code> 每个数据用一个包含两个元素的数组表示就行了。</p>\n<md-live lang="js" code="\'b3B0aW9uID0gewogIHhBeGlzOiB7fSwKICB5QXhpczoge30sCiAgc2VyaWVzOiBbCiAgICB7CiAgICAgIGRhdGE6IFsKICAgICAgICBbMjAsIDEyMF0sCiAgICAgICAgWzUwLCAyMDBdLAogICAgICAgIFs0MCwgNTBdCiAgICAgIF0sCiAgICAgIHR5cGU6ICdsaW5lJwogICAgfQogIF0KfTs\'" v-bind="{}" />\n<h2 id="%E6%8A%98%E7%BA%BF%E5%9B%BE%E6%A0%B7%E5%BC%8F%E8%AE%BE%E7%BD%AE" tabindex="-1">折线图样式设置</h2>\n<h3 id="%E6%8A%98%E7%BA%BF%E7%9A%84%E6%A0%B7%E5%BC%8F" tabindex="-1">折线的样式</h3>\n<p>折线图中折线的样式可以通过 <code>lineStyle</code> 设置。可以为其指定颜色、线宽、折线类型、阴影、不透明度等等，具体的可以参考配置项手册 <a href="https://echarts.apache.org/option.html#series-line.lineStyle"><code>series.lineStyle</code></a> 了解。这里，我们以设置颜色（color）、线宽（width）和折线类型（type）为例说明。</p>\n<md-live lang="js" code="\'b3B0aW9uID0gewogIHhBeGlzOiB7CiAgICBkYXRhOiBbJ0EnLCAnQicsICdDJywgJ0QnLCAnRSddCiAgfSwKICB5QXhpczoge30sCiAgc2VyaWVzOiBbCiAgICB7CiAgICAgIGRhdGE6IFsxMCwgMjIsIDI4LCAyMywgMTldLAogICAgICB0eXBlOiAnbGluZScsCiAgICAgIGxpbmVTdHlsZTogewogICAgICAgIG5vcm1hbDogewogICAgICAgICAgY29sb3I6ICdncmVlbicsCiAgICAgICAgICB3aWR0aDogNCwKICAgICAgICAgIHR5cGU6ICdkYXNoZWQnCiAgICAgICAgfQogICAgICB9CiAgICB9CiAgXQp9Ow\'" v-bind="{}" />\n<p>这里设置折线宽度时，数据点描边的宽度是不会跟着改变的，而应该在数据点的配置项中另外设置。</p>\n<h3 id="%E6%95%B0%E6%8D%AE%E7%82%B9%E7%9A%84%E6%A0%B7%E5%BC%8F" tabindex="-1">数据点的样式</h3>\n<p>数据点的样式可以通过 <a href="https://echarts.apache.org/option.html#series-line.itemStyle"><code>series.itemStyle</code></a> 指定填充颜色（color）、描边颜色（borderColor）、描边宽度（borderWidth）、描边类型（borderType）、阴影（shadowColor）、不透明度（opacity）等。与折线样式的设置十分相似，这里不再展开说明。</p>\n<h2 id="%E5%9C%A8%E6%95%B0%E6%8D%AE%E7%82%B9%E5%A4%84%E6%98%BE%E7%A4%BA%E6%95%B0%E5%80%BC" tabindex="-1">在数据点处显示数值</h2>\n<p>在系列中，这数据点的标签通过 <a href="https://echarts.apache.org/option.html#series-line.label"><code>series.label</code></a> 属性指定。如果将 <code>label</code> 下的 <code>show</code> 指定为<code>true</code>，则表示该数值默认时就显示；如果为 <code>false</code>，而 <a href="https://echarts.apache.org/option.html#series-line.emphasis.label.show"><code>series.emphasis.label.show</code></a> 为 <code>true</code>，则表示只有在鼠标移动到该数据时，才显示数值。</p>\n<md-live lang="js" code="\'b3B0aW9uID0gewogIHhBeGlzOiB7CiAgICBkYXRhOiBbJ0EnLCAnQicsICdDJywgJ0QnLCAnRSddCiAgfSwKICB5QXhpczoge30sCiAgc2VyaWVzOiBbCiAgICB7CiAgICAgIGRhdGE6IFsxMCwgMjIsIDI4LCAyMywgMTldLAogICAgICB0eXBlOiAnbGluZScsCiAgICAgIGxhYmVsOiB7CiAgICAgICAgc2hvdzogdHJ1ZSwKICAgICAgICBwb3NpdGlvbjogJ2JvdHRvbScsCiAgICAgICAgdGV4dFN0eWxlOiB7CiAgICAgICAgICBmb250U2l6ZTogMjAKICAgICAgICB9CiAgICAgIH0KICAgIH0KICBdCn07\'" v-bind="{}" />\n<h2 id="%E7%A9%BA%E6%95%B0%E6%8D%AE" tabindex="-1">空数据</h2>\n<p>在一个系列中，可能一个横坐标对应的取值是“空”的，将其设为 0 有时并不能满足我们的期望--空数据不应被其左右的数据连接。</p>\n<p>在 ECharts 中，我们使用字符串 <code>\'-\'</code> 表示空数据，这对其他系列的数据也是适用的。</p>\n<md-live lang="js" code="\'b3B0aW9uID0gewogIHhBeGlzOiB7CiAgICBkYXRhOiBbJ0EnLCAnQicsICdDJywgJ0QnLCAnRSddCiAgfSwKICB5QXhpczoge30sCiAgc2VyaWVzOiBbCiAgICB7CiAgICAgIGRhdGE6IFswLCAyMiwgJy0nLCAyMywgMTldLAogICAgICB0eXBlOiAnbGluZScKICAgIH0KICBdCn07\'" v-bind="{}" />\n<blockquote>\n<p>注意区别这个例子中，“空”数据与取值为 0 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