我正在尝试了解美丽的 D3 库。\n真的\xe2\x80\x93 我不明白为什么下面的行不起作用。\n代码应该仅用特殊颜色填充少数圆圈。
\n\n<svg>\n<g id="row_1"> ... </g>\n<g id="row_1"> ... </g>\n<g id="row_3"> ... </g>\n <circle cx="16.887" cy="333.923" r="6.268"/>\n <circle cx="33.574" cy="333.923" r="6.268"/>\n <circle cx="50.262" cy="333.923" r="6.268"/>\n <circle cx="66.949" cy="333.923" r="6.268"/>\n <circle cx="167.074" cy="333.923" r="6.268"/>\n <circle cx="183.762" cy="333.923" r="6.268"/>\n <circle cx="333.387" cy="333.923" r="6.268"/>\n <circle cx="316.699" cy="333.923" r="6.268"/>\n <circle cx="300.199" cy="334.101" r="6.268"/>\n <circle cx="266.637" cy="333.923" r="6.268"/>\n <circle cx="250.137" cy="333.923" r="6.268"/>\n <circle cx="216.762" cy="333.923" r="6.268"/>\n</g>\n</svg>\n\n\n<script>\nvar i;\nvar identifierID;\nvar svg = d3.select("svg"); \n\nfor (i=0; i<=20; i++){\n identifierID = "#row_"+i;\n svg.select(identifierID).selectAll("circle")\n .filter(function(d){ return d …