这是d3 V4中的简单平行坐标 http://plnkr.co/edit/Ejg7CI7STPqXKB2tot51?p=preview
类似于https://bl.ocks.org/jasondavies/1341281，在V3中。
以下是重现问题的步骤： 步骤1。在第1列刷一些区域（比如0.8到0.4）.... 第2步。在第3列刷一些区域（比如0.7到0.4）.... 第三步。现在将axis column3拖动到column2的位置。 （所以基本上轴的排序会改变，从Column1,2,3,4 ......它将改为column1,3,2,4。
步骤4。刷新column3（现在在column1旁边）。您将看不到正在绘制路径。
任何帮助将不胜感激。 感谢
<!DOCTYPE html>
<meta charset="utf-8">
<style>
svg {
font: 10px sans-serif;
}
.background path {
fill: none;
stroke: #ddd;
stroke-opacity: .4;
shape-rendering: crispEdges;
}
.foreground path {
fill: none;
stroke: steelblue;
stroke-opacity: .7;
}
.brush .extent {
fill-opacity: .3;
stroke: #fff;
shape-rendering: crispEdges;
}
.axis line,
.axis path {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.axis text {
text-shadow: 0 1px 0 #fff, 1px 0 0 #fff, 0 -1px 0 #fff, -1px 0 0 #fff;
cursor: move;
}
</style>
<body>
<script src="http://d3js.org/d3.v4.min.js"></script>
<script>
var margin = {top: 30, right: 10, bottom: 10, left: 10},
width = 600 - margin.left - margin.right,
height = 200 - margin.top - margin.bottom;
var x = d3.scalePoint().rangeRound([0, width]).padding(1),
y = {},
dragging = {};
var line = d3.line(),
//axis = d3.axisLeft(x),
background,
foreground,
extents;
var container = d3.select("body").append("div")
.attr("class", "parcoords")
.style("width", width + margin.left + margin.right + "px")
.style("height", height + margin.top + margin.bottom + "px");
var svg = container.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 quant_p = function(v){return (parseFloat(v) == v) || (v == "")};
d3.json("convertcsvSO.json", function(error, cars) {
dimensions = d3.keys(cars[0]);
x.domain(dimensions);
dimensions.forEach(function(d) {
var vals = cars.map(function(p) {return p[d];});
if (vals.every(quant_p)){
y[d] = d3.scaleLinear()
.domain(d3.extent(cars, function(p) {
return +p[d]; }))
.range([height, 0])
}
else{
vals.sort();
y[d] = d3.scalePoint()
.domain(vals.filter(function(v, i) {return vals.indexOf(v) == i;}))
.range([height, 0],1);
}
})
extents = dimensions.map(function(p) { return [0,0]; });
// Add grey background lines for context.
background = svg.append("g")
.attr("class", "background")
.selectAll("path")
.data(cars)
.enter().append("path")
.attr("d", path);
// Add blue foreground lines for focus.
foreground = svg.append("g")
.attr("class", "foreground")
.selectAll("path")
.data(cars)
.enter().append("path")
.attr("d", path);
// Add a group element for each dimension.
var g = svg.selectAll(".dimension")
.data(dimensions)
.enter().append("g")
.attr("class", "dimension")
.attr("transform", function(d) { return "translate(" + x(d) + ")"; })
.call(d3.drag()
.subject(function(d) { return {x: x(d)}; })
.on("start", function(d) {
dragging[d] = x(d);
background.attr("visibility", "hidden");
})
.on("drag", function(d) {
dragging[d] = Math.min(width, Math.max(0, d3.event.x));
foreground.attr("d", path);
dimensions.sort(function(a, b) { return position(a) - position(b); });
x.domain(dimensions);
g.attr("transform", function(d) { return "translate(" + position(d) + ")"; })
})
.on("end", function(d) {
delete dragging[d];
transition(d3.select(this)).attr("transform", "translate(" + x(d) + ")");
transition(foreground).attr("d", path);
background
.attr("d", path)
.transition()
.delay(500)
.duration(0)
.attr("visibility", null);
}));
// Add an axis and title.
var g = svg.selectAll(".dimension");
g.append("g")
.attr("class", "axis")
.each(function(d) { d3.select(this).call(d3.axisLeft(y[d]));})
//text does not show up because previous line breaks somehow
.append("text")
.attr("fill", "black")
.style("text-anchor", "middle")
.attr("y", -9)
.text(function(d) { return d; });
// Add and store a brush for each axis.
g.append("g")
.attr("class", "brush")
.each(function(d) {
if(y[d].name == 'r'){
// console.log(this);
d3.select(this).call(y[d].brush = d3.brushY().extent([[-8, 0], [8,height]]).on("start", brushstart).on("brush", brush_parallel_chart));
}
})
.selectAll("rect")
.attr("x", -8)
.attr("width", 16);
}); // closing
function position(d) {
var v = dragging[d];
return v == null ? x(d) : v;
}
function transition(g) {
return g.transition().duration(500);
}
// Returns the path for a given data point.
function path(d) {
return line(dimensions.map(function(p) { return [position(p), y[p](d[p])]; }));
}
// brush start function
function brushstart() {
d3.event.sourceEvent.stopPropagation();
}
// Handles a brush event, toggling the display of foreground lines.
function brush_parallel_chart() {
for(var i=0;i<dimensions.length;++i){
if(d3.event.target==y[dimensions[i]].brush) {
extents[i]=d3.event.selection.map(y[dimensions[i]].invert,y[dimensions[i]]);
}
}
foreground.style("display", function(d) {
return dimensions.every(function(p, i) {
if(extents[i][0]==0 && extents[i][0]==0) {
return true;
}
return extents[i][1] <= d[p] && d[p] <= extents[i][0];
}) ? null : "none";
});
}
</script>
答案 0 :(得分：0)
在drag回调中，尺寸正在排序但范围不是。我添加了几行，根据新维度对范围数组进行排序（使用原始数组origDimensions）
这是你的傻瓜的分叉：http://plnkr.co/edit/DquAXNv2mbbok7ssNuoX?p=preview
相关代码：
var origDimensions = dimensions.slice(0);
在dragend回调中：
// one way of sorting the extents array based on dimensions
var new_extents = [];
for(var i=0;i<dimensions.length;++i){
new_extents.push(extents[origDimensions.indexOf(dimensions[i])]);
}
extents = new_extents;
origDimensions = dimensions.slice(0); // setting origDimensions to the new array
希望这会有所帮助。 （顺便说一下，brushstart似乎是空的，导致刷子重置时显示NO曲线 - 尝试在任意轴上重置刷子。）