echarts更改legend图形

在ECharts中，可以通过修改图例（legend）的参数来更改图形的样式。具体来说，可以使用legend的data属性中的icon参数来指定图例的图形样式。可选的图形样式包括：'circle'、'rect'、'roundRect'、'triangle'、'diamond'、'pin'、'arrow'和'none'。通过修改icon参数，可以实现不同的风格样式。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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