echart折线图设置渐变色

本文介绍了如何使用ECharts库来创建一个具有渐变颜色的折线图。通过设置itemStyle的color属性为LinearGradient对象,可以实现折线和区域填充的渐变效果。示例代码详细展示了如何配置x轴、y轴,以及定义数据和渐变颜色的具体步骤。

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option = {
    xAxis: {
        type: 'category',
        boundaryGap: false,
        data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
    },
    yAxis: {
        type: 'value'
    },
    series: [{
        name:'样例3',
                        type:'line',
                        itemStyle: {
                            color: '#6A5ACD', 
                            normal: {  
                                lineStyle: {        // 系列级个性化折线样式 
                                    width: 2, 
                                    type: 'solid', 
                                    color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{ 
                                        offset: 0, 
                                        color: '#0000FF' 
                                    }, { 
                                        offset: 1, 
                                        color: '#CD5C5C' 
                                    }]),//线条渐变色 
                                } 
                            }, 
                            emphasis: {
                                color: '#6A5ACD',   
                                lineStyle: {        // 系列级个性化折线样式 
                                    width: 2, 
                                    type: 'dotted', 
                                    color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{ 
                                        offset: 0, 
                                        color: '#1E90FF' 
                                    }, { 
                                        offset: 1, 
                                        color: '#0000FF' 
                                    }]) 
                                } 
                            } 
                        },//线条样式
                        areaStyle:{
                            normal:{
                               //颜色渐变函数 前四个参数分别表示四个位置依次为左、下、右、上
                                color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{

                                    offset: 0,
                                    color: 'rgba(80,141,255,0.39)'
                                }, {
                                    offset: .34,
                                    color: 'rgba(56,155,255,0.25)'
                                },{
                                    offset: 1,
                                    color: 'rgba(38,197,254,0.00)'
                                }])

                            }
                        },//区域颜色渐变
                        data:[450, 432, 401, 454, 590, 530, 110,242]
                 
    }]
};

f8dbbf2d4c3f5abf4e8147141c81423fcbd.jpg

转载于:https://my.oschina.net/u/2440810/blog/3066067

回答: 要设置echart折线图的背景色,可以使用areaStyle属性。在引用\[1\]中的代码中,可以看到在series对象中的type为line的部分,有一个areaStyle属性。在areaStyle属性中,可以设置normal属性,然后在normal属性中设置color属性,来指定背景色。在引用\[2\]中的代码中,可以看到设置了一个渐变的背景色,使用了echarts.graphic.LinearGradient来创建一个线性渐变。具体的颜色值可以根据需求进行调整。另外,还可以使用offset属性来设置渐变的起始位置和结束位置。例如,可以设置offset为0表示渐变的起始位置,设置offset为1表示渐变的结束位置。\[1\]\[2\]\[3\] #### 引用[.reference_title] - *1* *3* [echarts 折线图设置背景图](https://blog.youkuaiyun.com/m0_59993469/article/details/121659224)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^control_2,239^v3^insert_chatgpt"}} ] [.reference_item] - *2* [echars折线图添加背景](https://blog.youkuaiyun.com/LoveZJC96/article/details/126646728)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^control_2,239^v3^insert_chatgpt"}} ] [.reference_item] [ .reference_list ]
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