Question

在chrome中获得以下错误，看起来像path.line是我的json数据上的barfing我不知道为什么，它是有效的json。感谢您提前提供任何帮助！

我的代码：数据和错误都在代码之后。谢谢！

   <script>

// Set the dimensions of the canvas / graph
var margin = {top: 30, right: 20, bottom: 30, left: 50},
    width = 600 - margin.left - margin.right,
    height = 270 - margin.top - margin.bottom;

// Parse the date / time
var parseDate = d3.time.format("%d-%b-%y").parse;

// Set the ranges
var x = d3.time.scale().range([0, width]);
var y = d3.scale.linear().range([height, 0]);

// Define the axes
var xAxis = d3.svg.axis().scale(x)
    .orient("bottom").ticks(5);

var yAxis = d3.svg.axis().scale(y)
    .orient("left").ticks(5);

// Define the line
var valueline = d3.svg.line()
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.close); });

// Adds the svg canvas
var svg = d3.select("body")
    .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.csv("data.csv", function(error, data) {
//    data.forEach(function(d) {
//        d.date = parseDate(d.date);
//        d.close = +d.close;
//    });
// Get the data
DateFormat inputFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss.S");
d3.json("data.json", function(error, data) {
    data.forEach(function(d) {
      Date d.date = inputFormat.parse(d.SAMPLETIME);
      //  d.date = Date.parse(d.SAMPLETIME);
        d.close = parseFloat(d.SAMPLEVALUE);
    });

    // 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.close; })]);

    // Add the valueline path.
    svg.append("path")
        .attr("class", "line")
        .attr("d", valueline(data));

    // Add the X Axis
    svg.append("g")
        .attr("class", "x axis")
        .attr("transform", "translate(0," + height + ")")
        .call(xAxis);

    // Add the Y Axis
    svg.append("g")
        .attr("class", "y axis")
        .call(yAxis);

});

从js控制台获取的错误是（为简洁而缩短）

<path class="line" d="MNaN,210LNaN,210LNaN,210LNaN,210LNaN,210LNaN,210LNaN,210LNaN,210LNaN,210"></path>

我的json数据文件看起来像这样我正在使用SAMPLETIME和SAMPLEVALUE

[
  {
    "R_TABLE": "RN_QOS_DATA_0001",
    "TABLE_ID": "7947",
    "ROBOT": "xx",
    "SOURCE": "xx.xx.xx.net",
    "QOS": "QOS_PROC_QUEUE_LEN",
    "SAMPLETIME": "18-OCT-15 06.13.28.000000 PM",
    "SAMPLEVALUE": ".04"
  },
  {
    "R_TABLE": "RN_QOS_DATA_0001",
    "TABLE_ID": "7947",
    "ROBOT": "xx",
    "SOURCE": "xx.xx.xx.net",
    "QOS": "QOS_PROC_QUEUE_LEN",
    "SAMPLETIME": "18-OCT-15 06.23.28.000000 PM",
    "SAMPLEVALUE": ".01"
  },
  {
    "R_TABLE": "RN_QOS_DATA_0001",
    "TABLE_ID": "7947",
    "ROBOT": "xx",
    "SOURCE": "xx.xx.xx.net",
    "QOS": "QOS_PROC_QUEUE_LEN",
    "SAMPLETIME": "18-OCT-15 06.33.28.000000 PM",
    "SAMPLEVALUE": 0
  }
]

Answer 1

数据中的日期不是有效日期。

您可以在此fiddle

中看到这一点

您可以先拆分此日期以删除时间，如下所示：

var date = '18-OCT-15 06.23.28.000000 PM'

//split the string by the space and take the first part
 date.split(' ')[0];

// create new date object
 var new_date = new Date(date)

d3.js在path.line中给出NAN

1 个答案: