求示例代码
求课程示例代码
var width = 500, height = 250, margin = {left: 50, top: 30, right: 20, bottom: 20}, g_width = width - margin.left - margin.right, g_height = height - margin.top - margin.bottom; // 类似jq的链式调用 // 制作图中的线条 var svg = d3.select('#container') .append("svg:svg") // width,height .attr('width', width)//attribute .attr('height', height); var g = svg.append("g") .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); var data = [1, 3, 5, 7, 8, 4, 3, 7]; // 放大 var scale_x = d3.scaleLinear() .domain([0, data.length - 1]) .range([0, g_width]); var scale_y = d3.scaleLinear() .domain([0, d3.max(data)]) .range([g_height, 0]);// 切换坐标轴的朝向 var line_generator = d3.line() .x(function (d, i) { // d代表数据 // i代表下标 return scale_x(i); }) .y(function (d) { return scale_y(d); }) .curve(d3.curveCatmullRom.alpha(0.5)); g.append('path').attr('d', line_generator(data)); // 制作坐标轴 var x_axis = d3.axisBottom(scale_x), y_axis = d3.axisLeft(scale_y); g.append("g").call(x_axis) .attr("transform", "translate(0," + g_height + ")"); g.append("g").call(y_axis) .append("text").text("Price($)") // 设置单位等 .attr("transform", "rotate(-90)") // 定位 .attr("text-anchor", "end") .attr("dy", "1em");
#container { background: #ddd; width: 500px; height: 250px; } path { fill: none; stroke: #4682B4; stroke-width: 2; } text { fill: #000; } .domain, .tick line { stroke: gray; }
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