我是很新的D3很抱歉,如果這是顯而易見的,但我從遷移V3 d3.js到V4折線圖和正在錯誤:代碼遷移線圖到V4
TypeError: Cannot read property '0' of undefined
我看以前問問題,他們說,路[0] [0]是OK,而不是使用path.node()
此代碼是引發錯誤
var totalLength = [path[0][0].getTotalLength() , path[0].getTotalLength()] ;
console.log(totalLength);
部分
以下是整個代碼但我認爲這個問題是與日期格式我在一開始選擇做:
var margin = {top: 20, right: 50, bottom: 100, left: 500},
width = 1000 //- margin.left - margin.right,
height = 400 - margin.top - margin.bottom;
var parseDate = d3.time.format("%Y-%m-%d").parse;
/* var parseDate = d3.time.format("%d-%b-%y").parse; */
var x = d3.time.scale()
.range([0, width]);
var y = d3.scale.linear()
.range([height, 0]);
var color = d3.scale.category10();
var xAxis = d3.svg.axis()
.scale(x)
// .ticks(8)
.innerTickSize(2)
.outerTickSize(2)
.orient("bottom")
.tickFormat(d3.time.format("%b")); // tickFormat
var yAxis = d3.svg.axis()
.scale(y)
.tickFormat(function(d) { return d ;})
.ticks(5)
.innerTickSize(5)
.outerTickSize(2)
.orient("left");
var line = d3.svg.line()
.interpolate("basis")
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.accdnt); });
var svg = d3.select("#cell3").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.tsv("data.tsv", function(error, data) {
color.domain(d3.keys(data[2]).filter(function(key) { return key !== "date"; }));
data.forEach(function(d) {
d.date = parseDate(d.date);
});
var year = color.domain().map(function(name) {
return {
name: name,
values: data.map(function(d) {
return {date: d.date, accdnt: +d[name]};
})
};
});
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain([
0,d3.max(year, function(c) { return d3.max(c.values, function(v) { return v.accdnt; }); })
]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis);
svg.append("line")
.attr(
{
"class":"horizontalGrid",
"x1" : 0,
"x2" : width,
"y1" : y(0),
"y2" : y(0),
"fill" : "none",
"shape-rendering" : "crispEdges",
"stroke" : "black",
"stroke-width" : "1px",
"stroke-dasharray": ("3, 3")
});
var company = svg.selectAll(".company")
.data(year)
.enter().append("g")
.attr("class", "company");
var path = svg.selectAll(".company").append("path")
.attr("class", "line")
.attr("d", function(d) { return line(d.values); })
.style("stroke", function(d) { if (d.name == "2013")
{return "rgb(000,255,000)"}
if (d.name == "2014")
{return "rgb(045,255,251)"}
if (d.name == "2015")
{return "rgb(128,125,044)"}
else {return "#000";}
});
var totalLength = [path[0][0].getTotalLength(), path[0][1].getTotalLength()];
console.log(totalLength);
d3.select(path[0][0])
.attr("stroke-dasharray", totalLength[0] + " " + totalLength[0])
.attr("stroke-dashoffset", totalLength[0])
.transition()
.duration(2500)
.ease("linear")
.attr("stroke-dashoffset", 0);
d3.select(path[0][1])
.attr("stroke-dasharray", totalLength[1] + " " + totalLength[1])
.attr("stroke-dashoffset", totalLength[1])
.transition()
.duration(2500)
.ease("linear")
.attr("stroke-dashoffset", 0);
d3.select(path[0][2])
.attr("stroke-dasharray", totalLength[1] + " " + totalLength[1])
.attr("stroke-dashoffset", totalLength[1])
.transition()
.duration(2500)
.ease("linear")
.attr("stroke-dashoffset", 0);
});
我正在更新D3 v3.5.17 - > v4.4.0的許多組件,而且我幾乎有[此遷移指南](https://github.com/d3/d3/blob/master/CHANGES。 MD)在任何時候在標籤中打開:) –