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財產「長」在運行下面的代碼:遺漏的類型錯誤:無法讀取的不確定
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
display: none;
}
.line {
fill: none;
stroke: steelblue;
stroke-width: 1.5px;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.js"></script>
<script>
var margin = {top: 20, right: 20, bottom: 30, left: 50},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var parseDate = d3.time.format("%e-%m-%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.value); });
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 + ")");
d3.csv("http://localhost/webserver/data/downloads.csv", function(error, data) {
data.forEach(function(d) {
d.date = parseDate(d.date);
d.value = +d.value;
});
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain(d3.extent(data, function(d) { return d.value; }));
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("Price ($)");
svg.append("path")
.datum(data)
.attr("class", "line")
.attr("d", line);
});
</script>
我收到以下錯誤:
Uncaught TypeError: Cannot read property 'length' of undefined d3.v3.js:7296
該行有如下描述:
function d3_time_parse(date, template, string, j) {
var c, p, i = 0, n = template.length, m = string.length;
我的源數據看起來像這樣:
日期;值 23-4-2012; 12 24-4-2012; 10 25-4-2012; 13 26-4-2012; 24 27-4-2012; 45
我改變了分隔符,但你對屬性的含義是否區分大小寫? – csnake 2013-03-10 19:13:27
您在代碼中有'd.date'和'd.value',但在csv中有'Date'和'Value' – polybios 2013-03-10 19:29:42
現在正在工作,謝謝 – csnake 2013-03-10 19:58:51