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class="glyphicon glyphicon-menu-down"></span></a> <ul class="nav bd-sidenav level2" style="display:none"><li class="nav-item"><a class="nav-link"><span class="title">Bar</span> <span class="glyphicon glyphicon-menu-down"></span></a> <ul class="nav bd-sidenav level3" style="display:none"><li class="nav-item"><a href="/handbook/en/how-to/chart-types/bar/basic-bar" class="nav-link"><span class="title">Basic Bar</span></a> <ul class="nav bd-sidenav level4" style="display:none"></ul></li><li class="nav-item"><a href="/handbook/en/how-to/chart-types/bar/stacked-bar" class="nav-link"><span class="title">Stacked Bar</span></a> <ul class="nav bd-sidenav level4" style="display:none"></ul></li><li class="nav-item"><a href="/handbook/en/how-to/chart-types/bar/bar-race" class="nav-link"><span class="title">Bar Racing</span></a> <ul class="nav bd-sidenav level4" style="display:none"></ul></li><!----><li class="nav-item"><a href="/handbook/en/how-to/chart-types/bar/waterfall" class="nav-link"><span class="title">Waterfall</span></a> <ul class="nav bd-sidenav level4" style="display:none"></ul></li></ul></li><li class="nav-item"><a class="nav-link"><span class="title">Line</span> <span class="glyphicon glyphicon-menu-down"></span></a> <ul class="nav bd-sidenav level3" style="display:none"><li class="nav-item"><a href="/handbook/en/how-to/chart-types/line/basic-line" aria-current="page" class="nav-link nuxt-link-exact-active nuxt-link-active"><span class="title">Basic Line</span></a> <ul class="nav bd-sidenav level4" style="display:none"></ul></li><li class="nav-item"><a href="/handbook/en/how-to/chart-types/line/stacked-line" class="nav-link"><span class="title">Stacked Line</span></a> <ul class="nav bd-sidenav level4" style="display:none"></ul></li><li class="nav-item"><a href="/handbook/en/how-to/chart-types/line/area-line" class="nav-link"><span class="title">Area Chart</span></a> <ul class="nav bd-sidenav level4" style="display:none"></ul></li><li class="nav-item"><a 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style="display:none"></ul></li></ul></li><li class="nav-item"><a class="nav-link"><span class="title">Data</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/en/how-to/data/dynamic-data" class="nav-link"><span class="title">Dynamic Data</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">Label</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/en/how-to/label/rich-text" class="nav-link"><span class="title">Rich Text</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">Animation</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/en/how-to/animation/transition" class="nav-link"><span class="title">Data Transition</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">Interaction</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/en/how-to/interaction/drag" class="nav-link"><span class="title">Drag</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">Best Practices</span></div> <ul class="nav bd-sidenav level1"><!----><li class="nav-item"><a href="/handbook/en/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/en/best-practices/aria" class="nav-link"><span class="title">Aria</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">Edit Handbook</span></div> <ul class="nav bd-sidenav level1"><li class="nav-item"><a href="/handbook/en/meta/edit-guide" class="nav-link"><span class="title">Edit Guide</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="basic-line-chart" tabindex="-1">Basic Line Chart</h1> <h2 id="simple-example" tabindex="-1">Simple Example</h2> <p>We can use the following code to build a line chart which has x-axis as <code>category</code>, y-axis as <code>value</code>:</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>In this case, we set the type of axis to <code>category</code> and <code>value</code> under <code>xAxis</code> and <code>yAxis</code>. We also clarified the content on the x-axis through <code>data</code>. In <code>series</code>, we set the type to <code>line</code>, and specify the values of three points through <code>data</code>. In this way, we got a simple line chart.</p> <blockquote><p>The <code>type</code> here can be omitted because the defaults of the axis are <code>value</code> while <code>xAxis</code> has specified the category's <code>data</code>. In this case, <code>ECharts</code> can recognize that this is a category axis.</p></blockquote> <h2 id="line-chart-in-cartesian-coordinate-system" tabindex="-1">Line Chart in Cartesian Coordinate System</h2> <p>How to implement if we want the line chart to be continuous? The answer is simple, as long as every value in <code>data</code> of the <code>series</code> is represented by an array containing two elements.</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="customized-line-chart" tabindex="-1">Customized Line Chart</h2> <h3 id="line-style" tabindex="-1">Line Style</h3> <p>Line style can be changed by <code>lineStyle</code> setting. You can specify color, line width, polyline type and opacity etc.. For details, please see the handbook <a href="https://echarts.apache.org/option.html#series-line.lineStyle"><code>series.lineStyle</code></a> to figure out.</p> <p>Here is an example of setting color, line width and type.</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>When we set the line width here, the line width of items will not change. The line style of items needs to be set separately.</p> <h3 id="item-style" tabindex="-1">Item Style</h3> <p>Item style can be change by <a href="https://echarts.apache.org/option.html#series-line.itemStyle"><code>series.itemStyle</code></a>. It included <code>color</code>, <code>borderColor</code>, <code>borderStyle</code>, <code>borderWidth</code>, <code>borderType</code>, <code>shadowColor</code>, <code>opacity</code> and so on. It works the same as the <code>lineType</code>, so we will not do further discuss.</p> <h2 id="display-value-on-items." tabindex="-1">Display Value on Items.</h2> <p>In the series, the label of the item was specified by <a href="https://echarts.apache.org/option.html#series-line.label"><code>series.label</code></a>. If we change the <code>show</code> under <code>label</code> to <code>true</code>, the value will be displayed by default. Otherwise, if <a href="https://echarts.apache.org/option.html#series-line.emphasis.label.show"><code>series.emphasis.label.show</code></a> is <code>true</code>, the label will show only if the mouse moved across the item.</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="empty-data" tabindex="-1">Empty Data</h2> <p>In a <code>series</code>, there are empty data. It has some difference with <code>0</code>. While there are empty elements, the lines chart will ignore that point without pass through it----empty elements will not be connected by the points next by.</p> <p>In ECharts, we use <code>'-'</code> to represent null data, It is applicable for data in other series.</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>Please note the difference between the empty data and 0.</p></blockquote></article></div></div> <div class="post-contributors"><h3><span class="inline-block align-middle">Contributors</span> <a target="_blank" href="https://github.com/apache/echarts-handbook/tree/master/contents/en/how-to/chart-types/line/basic-line.md" title="Edit this Document" 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">Edit this page on GitHub</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(e,t,i,d,r,a,l,o,n,s,c,h,g,C,I,p,A,b,w,m,y,f,B,u,v,x,S,G,L,D,M,O,R,W,z,E,k,H,T,V,J,Q,X,P,K,F,Z,j,Y,U,N,_,q,$,ee,te,ie,de,re){return{layout:"default",data:[{html:'<h1 id="basic-line-chart" tabindex="-1">Basic Line Chart</h1>\n<h2 id="simple-example" tabindex="-1">Simple Example</h2>\n<p>We can use the following code to build a line chart which has x-axis as <code>category</code>, y-axis as <code>value</code>:</p>\n<md-live lang="js" code="\'b3B0aW9uID0gewogIHhBeGlzOiB7CiAgICB0eXBlOiAnY2F0ZWdvcnknLAogICAgZGF0YTogWydBJywgJ0InLCAnQyddCiAgfSwKICB5QXhpczogewogICAgdHlwZTogJ3ZhbHVlJwogIH0sCiAgc2VyaWVzOiBbCiAgICB7CiAgICAgIGRhdGE6IFsxMjAsIDIwMCwgMTUwXSwKICAgICAgdHlwZTogJ2xpbmUnCiAgICB9CiAgXQp9Ow\'" v-bind="{}" />\n<p>In this case, we set the type of axis to <code>category</code> and <code>value</code> under <code>xAxis</code> and <code>yAxis</code>. We also clarified the content on the x-axis through <code>data</code>. In <code>series</code>, we set the type to <code>line</code>, and specify the values of three points through <code>data</code>. In this way, we got a simple line chart.</p>\n<blockquote>\n<p>The <code>type</code> here can be omitted because the defaults of the axis are <code>value</code> while <code>xAxis</code> has specified the category\'s <code>data</code>. In this case, <code>ECharts</code> can recognize that this is a category axis.</p>\n</blockquote>\n<h2 id="line-chart-in-cartesian-coordinate-system" tabindex="-1">Line Chart in Cartesian Coordinate System</h2>\n<p>How to implement if we want the line chart to be continuous? The answer is simple, as long as every value in <code>data</code> of the <code>series</code> is represented by an array containing two elements.</p>\n<md-live lang="js" code="\'b3B0aW9uID0gewogIHhBeGlzOiB7fSwKICB5QXhpczoge30sCiAgc2VyaWVzOiBbCiAgICB7CiAgICAgIGRhdGE6IFsKICAgICAgICBbMjAsIDEyMF0sCiAgICAgICAgWzUwLCAyMDBdLAogICAgICAgIFs0MCwgNTBdCiAgICAgIF0sCiAgICAgIHR5cGU6ICdsaW5lJwogICAgfQogIF0KfTs\'" v-bind="{}" />\n<h2 id="customized-line-chart" tabindex="-1">Customized Line Chart</h2>\n<h3 id="line-style" tabindex="-1">Line Style</h3>\n<p>Line style can be changed by <code>lineStyle</code> setting. You can specify color, line width, polyline type and opacity etc.. For details, please see the handbook <a href="https://echarts.apache.org/option.html#series-line.lineStyle"><code>series.lineStyle</code></a> to figure out.</p>\n<p>Here is an example of setting color, line width and type.</p>\n<md-live lang="js" code="\'b3B0aW9uID0gewogIHhBeGlzOiB7CiAgICBkYXRhOiBbJ0EnLCAnQicsICdDJywgJ0QnLCAnRSddCiAgfSwKICB5QXhpczoge30sCiAgc2VyaWVzOiBbCiAgICB7CiAgICAgIGRhdGE6IFsxMCwgMjIsIDI4LCAyMywgMTldLAogICAgICB0eXBlOiAnbGluZScsCiAgICAgIGxpbmVTdHlsZTogewogICAgICAgIG5vcm1hbDogewogICAgICAgICAgY29sb3I6ICdncmVlbicsCiAgICAgICAgICB3aWR0aDogNCwKICAgICAgICAgIHR5cGU6ICdkYXNoZWQnCiAgICAgICAgfQogICAgICB9CiAgICB9CiAgXQp9Ow\'" v-bind="{}" />\n<p>When we set the line width here, the line width of items will not change. The line style of items needs to be set separately.</p>\n<h3 id="item-style" tabindex="-1">Item Style</h3>\n<p>Item style can be change by <a href="https://echarts.apache.org/option.html#series-line.itemStyle"><code>series.itemStyle</code></a>. It included <code>color</code>, <code>borderColor</code>, <code>borderStyle</code>, <code>borderWidth</code>, <code>borderType</code>, <code>shadowColor</code>, <code>opacity</code> and so on. It works the same as the <code>lineType</code>, so we will not do further discuss.</p>\n<h2 id="display-value-on-items." tabindex="-1">Display Value on Items.</h2>\n<p>In the series, the label of the item was specified by <a href="https://echarts.apache.org/option.html#series-line.label"><code>series.label</code></a>. If we change the <code>show</code> under <code>label</code> to <code>true</code>, the value will be displayed by default. Otherwise, if <a href="https://echarts.apache.org/option.html#series-line.emphasis.label.show"><code>series.emphasis.label.show</code></a> is <code>true</code>, the label will show only if the mouse moved across the item.</p>\n<md-live lang="js" code="\'b3B0aW9uID0gewogIHhBeGlzOiB7CiAgICBkYXRhOiBbJ0EnLCAnQicsICdDJywgJ0QnLCAnRSddCiAgfSwKICB5QXhpczoge30sCiAgc2VyaWVzOiBbCiAgICB7CiAgICAgIGRhdGE6IFsxMCwgMjIsIDI4LCAyMywgMTldLAogICAgICB0eXBlOiAnbGluZScsCiAgICAgIGxhYmVsOiB7CiAgICAgICAgc2hvdzogdHJ1ZSwKICAgICAgICBwb3NpdGlvbjogJ2JvdHRvbScsCiAgICAgICAgdGV4dFN0eWxlOiB7CiAgICAgICAgICBmb250U2l6ZTogMjAKICAgICAgICB9CiAgICAgIH0KICAgIH0KICBdCn07\'" v-bind="{}" />\n<h2 id="empty-data" tabindex="-1">Empty Data</h2>\n<p>In a <code>series</code>, there are empty data. It has some difference with <code>0</code>. While there are empty elements, the lines chart will ignore that point without pass through it----empty elements will not be connected by the points next by.</p>\n<p>In ECharts, we use <code>\'-\'</code> to represent null data, It is applicable for data in other series.</p>\n<md-live lang="js" code="\'b3B0aW9uID0gewogIHhBeGlzOiB7CiAgICBkYXRhOiBbJ0EnLCAnQicsICdDJywgJ0QnLCAnRSddCiAgfSwKICB5QXhpczoge30sCiAgc2VyaWVzOiBbCiAgICB7CiAgICAgIGRhdGE6IFswLCAyMiwgJy0nLCAyMywgMTldLAogICAgICB0eXBlOiAnbGluZScKICAgIH0KICBdCn07\'" v-bind="{}" />\n<blockquote>\n<p>Please note the difference between the empty data and 0.</p>\n</blockquote>\n',postPath:"en/how-to/chart-types/line/basic-line"}],fetch:{},error:d,state:{filled:!1,docVersion:"",ghVersion:"",visibleAffix:!1,homepage:{},adBlocked:!1,focusMode:!1,posts:{zh:[{title:"快速上手",dir:r},{title:"入门篇",dir:a,children:[{title:"获取 ECharts",dir:l},{title:"在项目中引入 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