我读到JSON is built on two structures。
我可以从JSON列表创建一个图表,但CakePHP的问题是输出是JSON对象格式。
如何使用D3脚本获取我的JSON对象?
(我使用d3.v4.min.js)
data.json
{
"result": [
{
"owner": "0",
"variable": "Setpoint",
"date": "2016-09-28T19:24:19-0400",
"datas": 20
},
{
"owner": "0",
"variable": "Setpoint",
"date": "2016-09-25T10:07:42-0400",
"datas": 20
}
]
}
脚本
var margin = {top: 20, right: 20, bottom: 30, left: 50},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
// parse the date / time
var parseTime = d3.timeParse("%Y-%m-%dT%H:%M:%S%Z");
// set the ranges
var x = d3.scaleTime().range([0, width]);
var y = d3.scaleLinear().range([height, 0]);
// define the line
var valueline = d3.line()
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.datas); });
// append the svg obgect to the body of the page
// appends a 'group' element to 'svg'
// moves the 'group' element to the top left margin
var svg = d3.select("#debug").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 + ")");
// Get the data
d3.json("http://localhost/badina/datas/d3/0/Setpoint.json", function(error, data) {
if (error) throw error;
// format the data
data.forEach(function(d) {
d.date = parseTime(d.date);
d.datas = +d.datas;
});
// Scale the range of the data
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain([0, d3.max(data, function(d) { return d.datas; })]);
// Add the valueline path.
svg.append("path")
.data([data])
.attr("class", "line")
.attr("d", valueline);
// Add the X Axis
svg.append("g")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x));
// Add the Y Axis
svg.append("g")
.call(d3.axisLeft(y));
});
答案 0 :(得分:0)
var data = data.result
d3.json("http://localhost/badina/data1.json", function(error, data) {
if (error) throw error;
var data = data.result
console.log(data);
// format the data
data.forEach(function(d) {