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D3 drag

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>d3</title> </head> <body> <div class="test"> </div> <script src="../js/jquery-2.1.4.js&…

D3.js 力导向图

花了大半天看了一个八十几行的代码..心累 力导向图是之前就有画过很多次的东西,但是这次的代码看上去很陌生,然后发现是D3更新了4.0.... 先贴代码 var svg = d3.select("svg"), width = +svg.attr("width"), height = +svg.attr("height"); var color = d3.scaleOrdinal(d3.schemeCategory20); var simulatio…

svg操纵方案 基于 D3 还是 angular？

之前还是想简单了, 现在重新写这篇.把逻辑拆分粒度的辨析,放到外面去. 问题提出:svg控制方案 基于 D3 还是 angular 根据这个,html 4种展现样式:普通的html,svg,2D canvas,webgl 3d canvas. Angular和D3都有各自的数据绑定方式来操作dom,需要合适的方式让它们不打架,代码尽量优雅. 1个dom元素只让1个框架去操作. 尤其是svg中各元素,最好不要ng绑定了一些,d3又绑定另一些. 我需求是:用svg做图形化输入和图文混合的dom展现.…

D3.js 入门学习(二) V4的改动

//d3.scan /* 新的d3.scan方法对数组进行线性扫描,并根据指定的比较函数返回至少一个元素的索引. 这个方法有点类似于d3.min和d3.max. 而d3.scan可以得到极值的索引而不仅仅是计算极值. */ var a1 = [1,3,5,2,9]; var i = d3.scan(a1,function(a,b){ return b-a; // 返回最大值的索引, a-b; 返回最小值的索引 }); console.log(i); //4; //d3.ticks d3.tick…

d3代码如何改造成update结构（恰当处理enter和exit）

d3的enter和exit 网上有很多blog讲解.说的还凑合的见:https://blog.csdn.net/nicolecc/article/details/50786661 如何把自己的rude绘图代码,进行精致化(update) 不多比比,上代码示例: d3.selectAll('.circle_group').children().remove(); var circle_group = d3.selectAll('.circle_group') .data(circleData) .…

[D3] Add hovercard

The way to add hovercard is Append a div with class 'hovercard' in the tick function, positioning the hovercard with 'd3.event.pageX and pageY' .hovercard { position: absolute; max-width: 400px; height: auto; padding: 5px; background-color: white; -w…

[D3] Add image to the node

We can create node with 'g' container, then append 'image' to the nodes. // Create container for the images const svgNodes = svg .append('g') .attr('class', 'nodes') .selectAll('circle') .data(d3.values(nodes)) .enter().append('g'); // Add image to t…

[D3] Drawing path in D3

Here we have a force layout with three nodes. In the example, we will link three nodes with line and path: import React, {Component} from 'react'; import * as d3 from 'd3'; const nodesData = [ {name: 'Alice', id: 0}, {name: 'Eve', id: 1}, {name: 'Bob…

[D3] Creating a D3 Force Layout in React

Learn how to leverage d3's layout module to create a Force Layout inside of React. We'll take a look at React's lifecycle methods, using them to bootstrap d3's force layout in order to render our visualization. import React, { Component } from 'react…

d3.js V5版本在vue里使用 自定义节点图片

var width = this.$refs.topInfo.offsetWidth; var height = this.$refs.topInfo.offsetHeight; var img_w = 77; var img_h = 80; var radius = 30; //console.log(width,height) var svg = d3.select("#forceDirected") .append("svg") .attr("wid…