我看到其他帖子有这个问题,但我似乎无法解决它。我是d3的新手,我正在尝试将一些数据加载到折线图中,但我不断收到错误
Invalid value for <path> attribute d="MNaN,250LNaN,71.05263157894737LNaN,55.26315789473685
我已经设置了一些例子(有效),但由于某些原因这不起作用。我从webservice获取数据作为以下形式的列表:Date =“1/1/2014”NumberOfActive = 1(示例)。我尝试过使用解析函数,但它们并没有真正起作用。这是我的代码:
var data;
var margin = { top: 20, right: 20, bottom: 30, left: 50 },
width = 1000 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;
function parseDateForViewing(d) {
return d3.time.format('%b %Y')(d3.time.format('%m/%d/%Y').parse(d));
}
function parseDate(d) {
return d3.time.format('%c')(d3.time.format('%m/%d/%Y').parse(d));
}
var x = d3.time.scale()
.range([0, width]);
var y = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
var line = d3.svg.line()
.x(function (d) { return x(d.Date); })
.y(function (d) { return y(d.NumberOfActive); });
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 + ")");
$.ajax({
type: "POST",
url: "Dashboard.aspx/GetActiveLoansData",
data: '',
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (thedata) {
var d = thedata.d;
data = thedata.d;
var _len = d.length;
var post, i;
for (i = 0; i < data.length; i++) {
d = data[i];
var t = parseDate(d.Date);
var s = d.Date;
x.domain(d3.extent(data, function (d) { return d.Date; }));
y.domain(d3.extent(data, function (d) { return d.NumberOfActive; }));
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Closed Loans");
svg.append("path")
.datum(data)
.attr("class", "line")
.attr("d", line);
}
}
});
答案 0 :(得分:3)
在实际绘制图表之前,我需要使用以下行转换日期:
for (i = 0; i < data.length; i++) {
data[i].Date = parseDate(data[i].Date);
}
这一行可以在以下最终代码中看到:
var data;
var margin = { top: 20, right: 60, bottom: 30, left: 50 },
width = 1000 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;
function parseDateForViewing(d) {
return d3.time.format('%b %Y')(d3.time.format('%m/%d/%Y').parse(d));
}
function parseDate2(d) {
return d3.time.format('%c')(d3.time.format('%m/%d/%Y').parse(d));
}
var parseDate = d3.time.format("%m/%d/%Y").parse;
var x = d3.time.scale()
.range([0, width]);
var y = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
var line = d3.svg.line()
.x(function (d) { return x(d.Date); })
.y(function (d) { return y(d.NumberOfActive); });
var svg = d3.select("#svgsection").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 + ")");
var d = thedata.d;
data = thedata.d;
var _len = d.length;
var post, i;
for (i = 0; i < data.length; i++) {
data[i].Date = parseDate(data[i].Date);
}
for (i = 0; i < data.length; i++) {
d = data[i];
x.domain(d3.extent(data, function (d) { return d.Date; }));
y.domain(d3.extent(data, function (d) { return d.NumberOfActive; }));
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Closed Loans");
svg.append("path")
.datum(data)
.attr("class", "line")
.attr("d", line);
svg.append("text")
.attr("x", (width / 2))
.attr("y", 0 - (margin.top / 2) + 10)
.attr("text-anchor", "middle")
.style("font-size", "16px")
.text("Closed Loans by Month");
答案 1 :(得分:1)
我遇到了与我的代码相同的问题。我发现这是因为如果没有值,则会出现此错误。我们必须检查我们使用的值,如: 如果(!值){ 值= CORRECT_VALUE; }