我刚开始使用 cubism.js
剥离示例代码我能够显示两个指标..一个计算(kpi1)-随机函数,一个来自Cube(kpi2)。一旦我将其更改为 1e3 计算的一个 - 随机 - 在 1s 的分辨率下显示良好,而来自 Cube 的那个则根本不显示,它在 1e4 的上下文步骤中完美运行。
这有效:
var context = cubism.context()
.serverDelay(0)
.clientDelay(0)
.step(1e4)
.size(960);
这不会:
var context = cubism.context()
.serverDelay(0)
.clientDelay(0)
.step(1e3)
.size(960);
我究竟做错了什么?
<!DOCTYPE html>
<html><head><meta http-equiv="content-type" content="text/html; charset=UTF-8"><meta charset="utf-8">
<title>Dashboard</title>
</head><body><div id="body">
<div id="kpi1"></div>
<div id="kpi2"></div>
<script src="../d3.v2.js"></script>
<script src="../cubism.v1.js"></script>
<script>function random(name) {
var value = 0,
values = [],
i = 0,
last;
return context.metric(function(start, stop, step, callback) {
start = +start, stop = +stop;
if (isNaN(last)) last = start;
while (last < stop) {
last += step;
value = Math.max(-10, Math.min(10, value + .8 * Math.random() - .4 + .2 * Math.cos(i += .2)));
values.push(value);
}
callback(null, values = values.slice((start - stop) / step));
}, name);
}</script>
<script>
var context = cubism.context()
.serverDelay(0)
.clientDelay(0)
.step(1e4)
.size(960);
var foo = random("foo");
var cube = context.cube();
d3.select("#kpi1").call(function(div) {
div.selectAll(".horizon")
.data([foo])
.enter().append("div")
.attr("class", "horizon")
.call(context.horizon());
});
d3.select("#kpi2").call(function(div) {
div.selectAll(".horizon")
.data([cube.metric("median(cube_compute(ms))")])
.enter().append("div")
.attr("class", "horizon")
.call(context.horizon());
});
</script>
</body></html>