ehcarts图表默认展示某个legends

您好！关于 ECharts 图表默认展示某个 legends，您需要在 ECharts 的配置项中使用 legend 属性来设置默认显示的 legend。具体的操作步骤如下：

1. 在 ECharts 的配置项中添加 legend 属性。

2. 在 legend 属性中设置默认显示的 legend 的名称，可以使用 selected 属性来设置。

例如，如果您要设置默认显示名为“legend1”的 legend，可以使用以下代码：

option = {
    legend: {
        data: ['legend1', 'legend2', 'legend3'],
        selected: {
            'legend1': true
        }
    },
    // 其他配置项
};

这样就可以设置默认显示名为“legend1”的 legend。希望能够帮到您！

相关问题

ehcarts图表有多个y轴时默认展示某几个legends

您好，关于 ECharts 图表有多个 Y 轴时默认展示某几个 legends 的问题，可以通过在每个 series 中设置 `legendHoverLink` 属性来实现。例如：

option = {
    legend: {
        data: ['销量', '价格']
    },
    tooltip: {},
    xAxis: {
        data: ['衬衫', '羊毛衫', '雪纺衫', '裤子', '高跟鞋', '袜子']
    },
    yAxis: [
        {
            type: 'value',
            name: '销量'
        },
        {
            type: 'value',
            name: '价格'
        }
    ],
    series: [
        {
            name: '销量',
            type: 'bar',
            data: [5, 20, 36, 10, 10, 20]
        },
        {
            name: '价格',
            type: 'line',
            yAxisIndex: 1, // 指定使用哪一个 Y 轴
            data: [10, 25, 20, 15, 30, 20],
            legendHoverLink: false // 禁用价格图例的 hover 效果
        }
    ]
};

在上面的示例中，我们将两个系列分别绑定在不同的 Y 轴上，并且通过设置 `legendHoverLink` 为 `false` 来禁用价格图例的 hover 效果。这样在图表中就只会展示销量一项的图例了。

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