更改GoogleChartSankey图的链接颜色
我有一个包含[from, to, value, color]条目的列表列表。我想在谷歌图表中用它创建一个桑基图。创建一个基本的桑基图并不困难，但是，我想根据列表中的 RGB 值更改链接颜色。我在文档中读到我们可以为style. 所以，我尝试以不同的方式添加它：
data.addColumn({type: 'string',role: 'style'});
或者：
data.addColumn('string', 'style');
但它们都不起作用。我也尝试将color属性设置为fill-color但无济于事。最后，我还尝试编辑options代码底部的变量，因为这里还定义了节点和链接颜色。但我不确定如何在此处使用列表值。简单地将colors列表更改为 RGB 值列表是行不通的，因为顺序不正确（错误的 RGB 值分配给链接）。如何确保使用列表第 4 个元素中的 RGB 值填充链接？可以在下面找到代码的当前输出。
<html>
<body>
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<div></div>
<script type="text/javascript">
google.charts.load("current", {
packages: ["sankey"]
});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'From');
data.addColumn('string', 'To');
data.addColumn('number', 'Weight');
data.addColumn({
type: 'string',
role: 'style'
});
data.addRows([
['C0_1', 'C0_2', 638, 'color: rgb(255, 207, 207)'],
['C0_1', 'C1_2', 164, 'color: rgb(255, 130, 130)'],
['C1_1', 'C0_2', 123, 'color: rgb(255, 207, 207)'],
['C1_1', 'C1_2', 1313, 'color: rgb(255, 130, 130)'],
['C0_2', 'C0_3', 555, 'color: rgb(255, 212, 212)'],
['C0_2', 'C1_3', 105, 'color: rgb(255, 127, 127)'],
['C1_2', 'C0_3', 111, 'color: rgb(255, 212, 212)'],
['C1_2', 'C1_3', 1320, 'color: rgb(255, 127, 127)'],
['C0_3', 'C0_4', 495, 'color: rgb(255, 217, 217)'],
['C0_3', 'C1_4', 80, 'color: rgb(255, 119, 119)'],
['C1_3', 'C0_4', 157, 'color: rgb(255, 217, 217)'],
['C1_3', 'C1_4', 1223, 'color: rgb(255, 119, 119)'],
['C0_4', 'C0_5', 374, 'color: rgb(255, 219, 219)'],
['C0_4', 'C1_5', 32, 'color: rgb(255, 66, 66)'],
['C0_4', 'C2_5', 157, 'color: rgb(255, 186, 186)'],
['C1_4', 'C0_5', 91, 'color: rgb(255, 219, 219)'],
['C1_4', 'C1_5', 623, 'color: rgb(255, 66, 66)'],
['C1_4', 'C2_5', 545, 'color: rgb(255, 186, 186)'],
['C0_5', 'C0_6', 299, 'color: rgb(255, 225, 225)'],
['C0_5', 'C1_6', 27, 'color: rgb(255, 63, 63)'],
['C0_5', 'C2_6', 59, 'color: rgb(255, 170, 170)'],
['C1_5', 'C0_6', 13, 'color: rgb(255, 225, 225)'],
['C1_5', 'C1_6', 425, 'color: rgb(255, 63, 63)'],
['C1_5', 'C2_6', 197, 'color: rgb(255, 170, 170)'],
['C2_5', 'C0_6', 136, 'color: rgb(255, 225, 225)'],
['C2_5', 'C1_6', 135, 'color: rgb(255, 63, 63)'],
['C2_5', 'C2_6', 409, 'color: rgb(255, 170, 170)'],
['C0_6', 'C0_7', 273, 'color: rgb(255, 219, 219)'],
['C0_6', 'C1_7', 29, 'color: rgb(255, 62, 62)'],
['C0_6', 'C2_7', 62, 'color: rgb(255, 199, 199)'],
['C1_6', 'C0_7', 12, 'color: rgb(255, 219, 219)'],
['C1_6', 'C1_7', 440, 'color: rgb(255, 62, 62)'],
['C1_6', 'C2_7', 116, 'color: rgb(255, 199, 199)'],
['C2_6', 'C0_7', 49, 'color: rgb(255, 219, 219)'],
['C2_6', 'C1_7', 211, 'color: rgb(255, 62, 62)'],
['C2_6', 'C2_7', 382, 'color: rgb(255, 199, 199)'],
['C0_7', 'C0_8', 239, 'color: rgb(255, 208, 208)'],
['C0_7', 'C1_8', 9, 'color: rgb(255, 40, 40)'],
['C0_7', 'C2_8', 31, 'color: rgb(255, 192, 192)'],
['C1_7', 'C0_8', 39, 'color: rgb(255, 208, 208)'],
['C1_7', 'C1_8', 403, 'color: rgb(255, 40, 40)'],
['C1_7', 'C2_8', 210, 'color: rgb(255, 192, 192)'],
['C2_7', 'C0_8', 77, 'color: rgb(255, 208, 208)'],
['C2_7', 'C1_8', 106, 'color: rgb(255, 40, 40)'],
['C2_7', 'C2_8', 344, 'color: rgb(255, 192, 192)'],
['C0_8', 'C0_9', 222, 'color: rgb(255, 227, 227)'],
['C0_8', 'C1_9', 24, 'color: rgb(255, 49, 49)'],
['C0_8', 'C2_9', 47, 'color: rgb(255, 191, 191)'],
['C1_8', 'C0_9', 6, 'color: rgb(255, 227, 227)'],
['C1_8', 'C1_9', 367, 'color: rgb(255, 49, 49)'],
['C1_8', 'C2_9', 110, 'color: rgb(255, 191, 191)'],
['C2_8', 'C0_9', 49, 'color: rgb(255, 227, 227)'],
['C2_8', 'C1_9', 147, 'color: rgb(255, 49, 49)'],
['C2_8', 'C2_9', 369, 'color: rgb(255, 191, 191)'],
['C0_9', 'C2_10', 24, 'color: rgb(255, 188, 188)'],
['C0_9', 'C1_10', 9, 'color: rgb(255, 26, 26)'],
['C0_9', 'C0_10', 192, 'color: rgb(255, 204, 204)'],
['C1_9', 'C2_10', 156, 'color: rgb(255, 188, 188)'],
['C1_9', 'C1_10', 332, 'color: rgb(255, 26, 26)'],
['C1_9', 'C0_10', 40, 'color: rgb(255, 204, 204)'],
['C2_9', 'C2_10', 340, 'color: rgb(255, 188, 188)'],
['C2_9', 'C1_10', 90, 'color: rgb(255, 26, 26)'],
['C2_9', 'C0_10', 67, 'color: rgb(255, 204, 204)'],
['C2_10', 'C2_11', 297, 'color: rgb(255, 198, 198)'],
['C2_10', 'C1_11', 137, 'color: rgb(255, 19, 19)'],
['C2_10', 'C0_11', 62, 'color: rgb(255, 237, 237)'],
['C1_10', 'C2_11', 75, 'color: rgb(255, 198, 198)'],
['C1_10', 'C1_11', 319, 'color: rgb(255, 19, 19)'],
['C1_10', 'C0_11', 13, 'color: rgb(255, 237, 237)'],
['C0_10', 'C2_11', 27, 'color: rgb(255, 198, 198)'],
['C0_10', 'C1_11', 23, 'color: rgb(255, 19, 19)'],
['C0_10', 'C0_11', 210, 'color: rgb(255, 237, 237)'],
['C2_11', 'C2_12', 247, 'color: rgb(255, 191, 191)'],
['C2_11', 'C1_12', 95, 'color: rgb(255, 0, 0)'],
['C2_11', 'C0_12', 43, 'color: rgb(255, 226, 226)'],
['C1_11', 'C2_12', 182, 'color: rgb(255, 191, 191)'],
['C1_11', 'C1_12', 267, 'color: rgb(255, 0, 0)'],
['C1_11', 'C0_12', 12, 'color: rgb(255, 226, 226)'],
['C0_11', 'C2_12', 60, 'color: rgb(255, 191, 191)'],
['C0_11', 'C1_12', 9, 'color: rgb(255, 0, 0)'],
['C0_11', 'C0_12', 180, 'color: rgb(255, 226, 226)'],
['C2_12', 'C2_13', 261, 'color: rgb(255, 183, 183)'],
['C2_12', 'C0_13', 98, 'color: rgb(255, 226, 226)'],
['C2_12', 'C1_13', 107, 'color: rgb(255, 20, 20)'],
['C1_12', 'C2_13', 86, 'color: rgb(255, 183, 183)'],
['C1_12', 'C0_13', 12, 'color: rgb(255, 226, 226)'],
['C1_12', 'C1_13', 243, 'color: rgb(255, 20, 20)'],
['C0_12', 'C2_13', 26, 'color: rgb(255, 183, 183)'],
['C0_12', 'C0_13', 166, 'color: rgb(255, 226, 226)'],
['C0_12', 'C1_13', 6, 'color: rgb(255, 20, 20)'],
['C2_13', 'C1_14', 69, 'color: rgb(255, 33, 33)'],
['C2_13', 'C0_14', 62, 'color: rgb(255, 245, 245)'],
['C2_13', 'C2_14', 219, 'color: rgb(255, 142, 142)'],
['C0_13', 'C1_14', 13, 'color: rgb(255, 33, 33)'],
['C0_13', 'C0_14', 185, 'color: rgb(255, 245, 245)'],
['C0_13', 'C2_14', 38, 'color: rgb(255, 142, 142)'],
['C1_13', 'C1_14', 201, 'color: rgb(255, 33, 33)'],
['C1_13', 'C0_14', 3, 'color: rgb(255, 245, 245)'],
['C1_13', 'C2_14', 134, 'color: rgb(255, 142, 142)'],
['C1_14', 'C1_15', 261, 'color: rgb(255, 75, 75)'],
['C1_14', 'C0_15', 12, 'color: rgb(255, 239, 239)'],
['C0_14', 'C1_15', 17, 'color: rgb(255, 75, 75)'],
['C0_14', 'C0_15', 196, 'color: rgb(255, 239, 239)'],
['C2_14', 'C1_15', 275, 'color: rgb(255, 75, 75)'],
['C2_14', 'C0_15', 104, 'color: rgb(255, 239, 239)'],
['C1_15', 'C0_16', 67, 'color: rgb(255, 241, 241)'],
['C1_15', 'C1_16', 464, 'color: rgb(255, 68, 68)'],
['C0_15', 'C0_16', 254, 'color: rgb(255, 241, 241)'],
['C0_15', 'C1_16', 26, 'color: rgb(255, 68, 68)'],
['C0_16', 'C1_17', 36, 'color: rgb(255, 59, 59)'],
['C0_16', 'C0_17', 251, 'color: rgb(255, 242, 242)'],
['C1_16', 'C1_17', 406, 'color: rgb(255, 59, 59)'],
['C1_16', 'C0_17', 61, 'color: rgb(255, 242, 242)'],
['C1_17', 'C1_18', 370, 'color: rgb(255, 64, 64)'],
['C1_17', 'C0_18', 48, 'color: rgb(255, 241, 241)'],
['C0_17', 'C1_18', 40, 'color: rgb(255, 64, 64)'],
['C0_17', 'C0_18', 245, 'color: rgb(255, 241, 241)'],
['C1_18', 'C1_19', 342, 'color: rgb(255, 73, 73)'],
['C1_18', 'C0_19', 41, 'color: rgb(255, 250, 250)'],
['C0_18', 'C1_19', 43, 'color: rgb(255, 73, 73)'],
['C0_18', 'C0_19', 224, 'color: rgb(255, 250, 250)'],
['C1_19', 'C0_20', 43, 'color: rgb(255, 255, 255)'],
['C1_19', 'C1_20', 323, 'color: rgb(255, 84, 84)'],
['C0_19', 'C0_20', 202, 'color: rgb(255, 255, 255)'],
['C0_19', 'C1_20', 41, 'color: rgb(255, 84, 84)'],
['C0_20', 'C1_21', 37, 'color: rgb(255, 97, 97)'],
['C0_20', 'C0_21', 188, 'color: rgb(255, 241, 241)'],
['C1_20', 'C1_21', 290, 'color: rgb(255, 97, 97)'],
['C1_20', 'C0_21', 55, 'color: rgb(255, 241, 241)']
]);
var colors = ['#a6cee3', '#b2df8a', '#fb9a99', '#fdbf6f',
'#cab2d6', '#ffff99', '#1f78b4', '#33a02c'
];
// Set chart options
var options = {
height: 400,
sankey: {
node: {
colors: colors,
width: 5,
nodePadding: 1
},
link: {
colorMode: 'gradient',
colors: colors
}
}
};
// Instantiate and draw our chart, passing in some options.
var chart = new google.visualization.Sankey(document.getElementById('sankey_multiple'));
chart.draw(data, options);
}
</script>
</body>
</html>
电流输出：