Javascript 如何在d3.js中创建动态条形图?
下面是一个完整应用程序的提琴: 下面是javascript:Javascript 如何在d3.js中创建动态条形图?,javascript,d3.js,bar-chart,Javascript,D3.js,Bar Chart,下面是一个完整应用程序的提琴: 下面是javascript: var HU = (function() { var data = [ {"time": "13:24:20", "level_1": "5553", "level_2": "4682", "level_3": "1005"}, {"time": "14:24:20", "level_1": "6553", "level_2": "5682", "level_3": "2005"},
var HU = (function() {
var data = [
{"time": "13:24:20", "level_1": "5553", "level_2": "4682", "level_3": "1005"},
{"time": "14:24:20", "level_1": "6553", "level_2": "5682", "level_3": "2005"},
{"time": "15:24:20", "level_1": "7553", "level_2": "6682", "level_3": "3005"},
{"time": "16:24:20", "level_1": "8553", "level_2": "7682", "level_3": "3131"},
{"time": "17:24:20", "level_1": "9953", "level_2": "5500", "level_3": "5005"},
{"time": "18:24:20", "level_1": "8565", "level_2": "7682", "level_3": "6005"},
{"time": "19:24:20", "level_1": "7753", "level_2": "4546", "level_3": "4405"}
];
init = function() {
var margin = {
top: 10,
right: 10,
bottom: 30,
left: 50
},
width = 950 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var parseDate = d3.time.format("%H:%M:%S").parse;
var x = d3.time.scale()
.domain(d3.extent(data, function(d) { return parseDate(d.time); }))
.range([0, width]);
var y = d3.scale.linear()
.domain([0, d3.max(data, function(d) { return d.level_1; })])
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.tickFormat(d3.time.format(("%H:%M:%S")));
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
var svg = d3.select("#chart")
.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0, " + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis);
var bars = svg.selectAll("rect")
.data(data)
.enter();
bars.append("rect")
.attr("x", function(d) { return x(parseDate(d.time)); })
.attr("y", function(d) { return y(d.level_1); })
.attr("width", 15)
.attr("height", function(d) { return height - y(d.level_1); })
.style("fill", "steelblue");
bars.append("rect")
.attr("x", function(d) { return x(parseDate(d.time)); })
.attr("y", function(d) { return y(d.level_2); })
.attr("width", 15)
.attr("height", function(d) { return height - y(d.level_2); })
.style("fill", "green");
bars.append("rect")
.attr("x", function(d) { return x(parseDate(d.time)); })
.attr("y", function(d) { return y(d.level_3); })
.attr("width", 15)
.attr("height", function(d) { return height - y(d.level_3); })
.style("fill", "red");
};
return {
init: init
};
})();
HU.init();
随着每秒的滴答声,我需要最左边的列添加一个新的数据点,将以前的数据点推到右边
我还希望每秒对数据本身进行动态更改,例如:
- 每个级别_1数据点=当前级别_1 val+(之间的随机值 +当前水平的7%和-7%(1 val)
- 每级2随机降低该值10-30%
- 每个级别的\u 3随机值比级别的\u 2值低10-30%
drawLevel = function(level) {
var random;
svg.selectAll("rect")
.data(data)
.transition()
.duration(1000)
.attr("y", function(d) {
var min = d.level[level] - (d.level[level-1] * 0.03);
var max = d.level[level] - (d.level[level-1] * 0.01);
random = Math.floor(Math.random() * (max - min + 1) + min);
return height - y(random) - .5;
})
.attr("height", function(d) {
return y(random);
});
}
drawLevel(1);
var l = 2;
setInterval(function() {
drawLevel(l);
l = l + 1;
}, 1000);
下面是一个使用setInterval()的示例
你看到了吗?@Lars Kotthoff:我做了一些改变:。出于某种原因,但并非所有重画级别函数都会触发。我怎么能让它被触发60秒,比如在一分钟内调用这些函数60次?提前谢谢。我看不到链接的内容。你能把它贴在像JSFIDLE这样的地方吗?干杯