我难以尝试渲染一条线 - 我怀疑它与日期格式或x轴范围有关，因为我看到这条线为svg，宽度为-1。
我是D3的新手，并试图用它来描绘过去所有NFL赛季中每支球队的历史。 X轴是年份，Y轴是它们的胜率，0-1之间的值。
我可以得到图表呈现两个轴但没有线。在检查元素时，我看到应该是该行的路径，但是当我将其悬停时，它显示为“path.line -1px x 333px”。1
该行的路径是
<path class="line" d="M-125905248000000,345.7142857142857C-118914768000000,345.7142857142857,-97962480000000,298.57142857142856,-83962368000000,298.57142857142856S-55904688000000,282.8571428571429,-41904576000000,282.8571428571429S-13942656000000,361.42857142857144,38304000000,361.42857142857144S28000224000000,282.8571428571429,41981184000000,282.8571428571429S69923952000000,361.42857142857144,83924064000000,361.42857142857144S111981744000000,282.8571428571429,125981856000000,282.8571428571429S153943776000000,282.8571428571429,167924736000000,282.8571428571429S195886656000000,377.14285714285717,209867616000000,377.14285714285717S237810384000000,314.2857142857143,251810496000000,314.2857142857143S279868176000000,345.7142857142857,293868288000000,345.7142857142857S321830208000000,247.5,335811168000000,247.5S363773088000000,220,377754048000000,220S405696816000000,412.5,419696928000000,412.5S447754608000000,330,461754720000000,330S489716640000000,244.44444444444446,503697600000000,244.44444444444446S531659520000000,220,545640480000000,220S573583248000000,247.5,587583360000000,247.5S615641040000000,302.5,629641152000000,302.5S657603072000000,247.5,671584032000000,247.5S699545952000000,88,713526912000000,88S741469680000000,165,755469792000000,165S783527472000000,192.5,797527584000000,192.5S825489504000000,220,839470464000000,220S867432384000000,137.5,881413344000000,137.5S909356112000000,110,923356224000000,110S951413904000000,220,965414016000000,220S993375936000000,247.5,1007356896000000,247.5S1035318816000000,247.5,1049299776000000,247.5S1077242544000000,357.5,1091242656000000,357.5S1119300336000000,275,1133300448000000,275S1161262368000000,275,1175243328000000,275S1203205248000000,357.5,1217186208000000,357.5S1245128976000000,165,1259129088000000,165S1287186768000000,247.5,1301186880000000,247.5S1329148800000000,192.5,1343129760000000,192.5S1371091680000000,220,1385072640000000,220S1413015408000000,220,1427015520000000,220S1455073200000000,357.5,1469073312000000,357.5S1497035232000000,165,1511016192000000,165S1538978112000000,247.5,1552959072000000,247.5S1580901840000000,220,1594901952000000,220S1622959632000000,82.5,1636959744000000,82.5S1664921664000000,137.5,1678902624000000,137.5S1706864544000000,82.5,1720845504000000,82.5S1755797904000000,247.5,1762788384000000,247.5" style="stroke: #d2b887;"></path>
尝试调试时，如果我使用整数而不是X轴的日期，我可以让线条渲染得很好。
在我决定将数据格式从CSV更改为JSON之前，一切正常。我目前使用的格式类似于
[{"color": "#D2B887", "seasons": [{"record": 0.21428571428571427, "wins": "3", "ties": "0", "losses": "11", "year": "1967"}, {"record": 0.32142857142857145, "wins": "4", "ties": "1", "losses": "9", "year": "1968"}], "display_name": "New Orleans Saints", "team": "aints"}]
我正在使用
操纵这一年d3.time.format("%Y").parse;
使用
设置域名x.domain([parseDate("1920"), parseDate("2013")]);
我使用console.log()验证日期格式为“Sun Jan 01 2006 00:00:00 GMT-0800（PST）”
这里的完整代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>NFL Standings</title>
<script type="text/javascript" src="d3.v3/d3.v3.js"></script>
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-19251792-1']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
<style> /* set the CSS */
body { font: 12px Arial;}
path {
stroke: LightGray;
stroke-width: 2;
fill: none;
}
.axis path,
.axis line {
fill: none;
stroke: grey;
stroke-width: 1;
shape-rendering: crispEdges;
}
</style>
<body>
<div id="outer" style="width:100%">
<div id="inner" style="display:table;margin:0 auto;">
<h1>NFL Win Percentages</h1>
<script type="text/javascript">
// Set the dimensions of the canvas / graph
var margin = {top: 30, right: 20, bottom: 30, left: 50},
width = 1400 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
// Parse the date / time
var parseDate = d3.time.format("%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, i) { return x( parseDate(d.year) ) })
.y(function(d) { return y( d.record ) })
.interpolate("monotone");
// 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 + ")");
var team_season_data;
// Iterate over each team and plot the line for that team
d3.json("data/nfl_team_season_data.json", function(error, json) {
if (error) return console.warn(error);
team_season_data = json;
// Add the valueline paths
svg.selectAll("path")
.data(team_season_data)
.enter()
.append("path") // Add the valueline path.
.attr("class", "line")
.style("stroke", function(d) {
return d.color;
})
.attr("d", function(d) {
return valueline(d.seasons);
})
.on("mouseover",function(d) {
d3.select(this).style("stroke", function(d) {
return d.color;
})
})
.on("mouseout",function(d) {
d3.select(this).style("stroke", "LightGray")
});
// Scale the range of the data
x.domain([parseDate("1920"), parseDate("2013")]);
y.domain([0, 1]);
// 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);
});
</script>
</div //inner>
</div //outer>
</body>
请参阅http://bl.ocks.org/GregKroleski/6124514
的工作要点有什么想法吗？
答案 0 :(得分：1)
您需要在使用之前设置比例的域名。
目前，您在创建x元素后（通过d3.svg.line实例间接）设置了y和path比例域。因此，您将获得这些比例的默认域名，这会导致无意义的值。