日期:2014-05-16 浏览次数:20328 次
//Width and height | |
var w = 500; | |
var h = 100; | |
var dataset = [ 5, 10, 13, 19, 21, 25, 22, 18, 15, 13, | |
11, 12, 15, 20, 18, 17, 16, 18, 23, 25 ]; | |
//Create SVG element | |
var svg = d3.select("body") | |
.append("svg") | |
.attr("width", w) | |
.attr("height", h); | |
svg.selectAll("rect") | |
.data(dataset) | |
.enter() | |
.append("rect") | |
.attr("x", 0) | |
.attr("y", 0) | |
.attr("width", 20) | |
.attr("height", 100); |
控制x坐标的起始位置(i*21)
//Width and height | |
var w = 500; | |
var h = 100; | |
var dataset = [ 5, 10, 13, 19, 21, 25, 22, 18, 15, 13, | |
11, 12, 15, 20, 18, 17, 16, 18, 23, 25 ]; | |
//Create SVG element | |
var svg = d3.select("body") | |
.append("svg") | |
.attr("width", w) | |
.attr("height", h); | |
svg.selectAll("rect") | |
.data(dataset) | |
.enter() | |
.append("rect") | |
.attr("x", function(d, i) { | |
return i * 21; //Bar width of 20 plus 1 for padding | |
}) | |
.attr("y", 0) | |
.attr("width", 20) | |
.attr("height", 100); |
除的方式(i * (w / dataset.length);)作为条和间隙的总宽度,在设置固定宽度小于总宽度,这时就会自然生成一个空白间隙
一句话:条的宽度固定,总宽-条宽=空白宽。空白宽取决于总宽,总宽取决于计算表达式(w / dataset.length)
//Width and height | |
var w = 500; | |
var h = 100; | |
var barPadding = 1; | |
var dataset = [ 5, 10, 13, 19, 21, 25, 22, 18, 15, 13, | |
11, 12, 15, 20, 18, 17, 16, 18, 23, 25 ]; | |
//Create SVG element | |
var svg = d3.select("body") | |
.append("svg") | |
.attr("width", w) | |
.attr("height", h); | |
svg.selectAll("rect") | |
.data(dataset) | |
.enter() | |