Javascript D3折线图-未捕获类型错误:无法读取属性';长度';未定义的
我正在处理一个基于D3的图表,我收到一个“UncaughtTypeError:Cannotreadproperty'length'of undefined”错误,无法找出问题所在。感谢您的帮助 以下是错误堆栈:Javascript D3折线图-未捕获类型错误:无法读取属性';长度';未定义的,javascript,d3.js,Javascript,D3.js,我正在处理一个基于D3的图表,我收到一个“UncaughtTypeError:Cannotreadproperty'length'of undefined”错误,无法找出问题所在。感谢您的帮助 以下是错误堆栈: 第d3.v3.js行:2810 属性函数d3.v3.js:1527 (匿名函数)d3.v3.js:1854 d3_选择_每个d3.v3.js:1860 d3_selectionPrototype.each d3.v3.js:1853 d3_selectionPrototype.attr
- 第d3.v3.js行:2810
- 属性函数d3.v3.js:1527
- (匿名函数)d3.v3.js:1854
- d3_选择_每个d3.v3.js:1860
- d3_selectionPrototype.each d3.v3.js:1853
- d3_selectionPrototype.attr d3.v3.js:1510
- (匿名函数)main.js:74
- (匿名函数)d3.v3.js:442
- 事件d3.v3.js:526
- 回复d3.v3.js:404
var data;
var BEI = {};
d3.csv("/pmo/sandbox-lcs/jwstWithD3/BEI2.csv", function(error, data) {
if (error) {
console.log("Error: ",error)
} else {
//console.log("Data: ",data);
}
var m = [40, 120, 40, 120]; // margins
var w = 600; // width
var h = 300; // height
var baselineStartDates = [];
var baselineFinishDates = [];
var dateDiffArr = [];
var statusDate = new Date('3/31/14');
var duration = ["2013-01-01","2019-12-31"];
var x = d3.time.scale()
.domain([new Date(duration[0]),new Date(duration[1])])
.range([0, w]),
xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.ticks(d3.time.months,3)
.tickFormat(d3.time.format("%m-%y")),
y = d3.scale.linear()
.domain([0,2]).range([h, 0]),
yAxis = d3.svg.axis()
.scale(y)
.ticks(10)
.orient("left")
// Add an SVG element with the desired dimensions and margin.
var graph = d3.select("#viz").append("svg:svg")
.attr("width", w + m[1] + m[3])
.attr("height", h + m[0] + m[2])
.attr("id","chart_bei")
.append("svg:g")
.attr("transform", "translate(" + m[3] + "," + m[0] + ")");
// Add the x-axis.
graph.append("svg:g")
.attr("class", "axis_x")
.attr("transform", "translate(0," + h + ")")
.call(xAxis)
.selectAll("text")
.attr("y", 0)
.attr("x", 9)
.attr("dy", ".35em")
.attr("transform", "rotate(90)")
.style("text-anchor", "start");
// Add the y-axis to the left
graph.append("svg:g")
.attr("class", "axis_y")
.attr("transform", "translate(0,0)")
.call(yAxis);
var BEIHard = [{"Date":"2013-01-01","BEI":0.89},
{"Date":"2019-12-31","BEI":0.79},
{"Date":"2018-12-31","BEI":0.49}];
graph.append("svg:path")
.attr("class", "line")
.attr("d", d3.svg.line() // <<--stack error
.x(function(d) { return x(new Date(BEIHard["StatusDate"])) })
.y(function(d) { return y(BEIHard["BEI"]) })
);
// Not currently being used
function getBEI() {
var BEI = BEI;
var BEIIncomplete = [];
var BEIIncompleteTaskCount = 0;
var BEITotalTaskCount = 0;
data.forEach(function(d,i) {
var baselineFinish = new Date(data[i]["Baseline_Finish"]);
var percentComplete = data[i]["Percent_Complete"];
if ( baselineFinish < statusDate ) {
BEITotalTaskCount +=1;
if ( parseInt(percentComplete) < 100 ) {
BEIIncompleteTaskCount +=1;
BEIIncomplete.push(data[i]);
//document.getElementById('bei').innerHTML += '<strong>ID: </strong>' + JSON.stringify(data[i]["ID"], null, 4) + ' <strong>NAME: </strong>' + JSON.stringify(data[i]["Name"], null, 4) + '<br />';
}
}
})
BEI = { "Status Date": statusDate,"BEI": (((BEITotalTaskCount-BEIIncompleteTaskCount)/BEITotalTaskCount)).toFixed(1)} ;
document.getElementById('bei').innerHTML += '<h1>BEI = <strong>' + BEI["BEI"] + '%</strong></h1>';
window.BEI = BEI;
//console.log("BEI: ", (BEITotalTaskCount-BEIIncompleteTaskCount)/BEITotalTaskCount);
//console.log("Number of Incomplete Tasks: ",BEIIncompleteTaskCount);
//console.log("Total Count of BEI Tasks", BEITotalTaskCount);
//console.log("Incomplete Tasks: ",BEIIncomplete);
//console.log("Local BEI: ",BEI);
return BEI;
}getBEI();
});
var数据;
var-BEI={};
d3.csv(“/pmo/sandbox lcs/jwstWithD3/BEI2.csv”),函数(错误,数据){
如果(错误){
日志(“错误:”,错误)
}否则{
//日志(“数据:”,数据);
}
var m=[40120,40120];//边距
var w=600;//宽度
var h=300;//高度
var baselineStartDates=[];
var baselineFinishDates=[];
var dateDiffArr=[];
var statusDate=新日期('3/31/14');
风险值持续时间=[“2013-01-01”、“2019-12-31”];
var x=d3.time.scale()
.domain([新日期(持续时间[0]),新日期(持续时间[1]))
.范围([0,w]),
xAxis=d3.svg.axis()
.比例(x)
.orient(“底部”)
.滴答声(d3.时间.月份,3)
.tickFormat(d3.time.format(“%m-%y”),
y=d3.刻度.线性()
.domain([0,2])。range([h,0]),
yAxis=d3.svg.axis()
.比例(y)
.滴答声(10)
.东方(“左”)
//添加具有所需尺寸和边距的SVG元素。
var-graph=d3.选择(“viz”).追加(“svg:svg”)
.attr(“宽度”,w+m[1]+m[3])
.attr(“高度”,h+m[0]+m[2])
.attr(“id”、“图表”)
.append(“svg:g”)
.attr(“转换”、“平移”(+m[3]+”、“+m[0]+”));
//添加x轴。
graph.append(“svg:g”)
.attr(“类”、“轴x”)
.attr(“转换”、“平移(0、+h+)”)
.呼叫(xAxis)
.selectAll(“文本”)
.attr(“y”,0)
.attr(“x”,9)
.attr(“dy”,“.35em”)
.attr(“变换”、“旋转(90)”)
.style(“文本锚定”、“开始”);
//将y轴添加到左侧
graph.append(“svg:g”)
.attr(“类”、“轴y”)
.attr(“转换”、“转换(0,0)”)
.呼叫(yAxis);
var BEIHard=[{“日期”:“2013-01-01”,“BEI”:0.89},
{“日期”:“2019-12-31”,“BEI”:0.79},
{“日期”:“2018-12-31”,“BEI”:0.49}];
append(“svg:path”)
.attr(“类”、“行”)
.attr(“d”,d3.svg.line()/我通过以下调整解决了此问题:
var line = d3.svg.line()
.x(function(d,i) { return x( new Date(d["Date"]) ) })
.y(function(d,i) { return y( d["BEI"] ) });
graph.append("svg:path")
.attr("class", "line")
.attr("d", function(d,i) { return line(BEIHard); });
如果有人能解释为什么与第一个示例相比,这个解决方案有效,我想知道。问题是您没有向线路生成器传递任何数据。谢谢,Lars。昨晚很晚了,它没有点击。今天早上看它完全有意义。我期待着这成为第二天性。谢谢谢谢你的反馈。