将 d3 交互式矩阵散点图更新到 v4 时出现问题
Issue with updating d3 interactive matrix scatterplot to v4
我正在尝试通过将我感兴趣的各种 v3 脚本更新为 v4 来提高 D3.js 的技能,但是我在尝试 "port" Mike 的交互式散点图矩阵时遇到了困难Bostok 发帖于此:https://bl.ocks.org/mbostock/4063663
虽然我已经毫无问题地移植了代码的静态版本(没有画笔),但当我尝试以与 v3 相同的方式实现画笔时,我发现了一个似乎是实际 D3 问题的问题不仅仅是与我的 D3 noob-ness 相关:刷子似乎粘在散点图矩阵上的错误单元格上!
特别是,如果我删除了 brushmove 部分并且我只是记录以控制数量 p.i 和 p.j(它们标识我们正在刷的散点图矩阵中的哪个单元格),我卡住了 i = 3指数.
var width = 960,
size = 230,
padding = 20;
var x = d3.scaleLinear()
.range([padding / 2, size - padding / 2]);
var y = d3.scaleLinear()
.range([size - padding / 2, padding / 2]);
var xAxis = d3.axisBottom()
.scale(x)
.ticks(6);
var yAxis = d3.axisLeft()
.scale(y)
.ticks(6);
var color = d3.scaleOrdinal(d3.schemeCategory10);
//d3.csv("flowers.csv", function(error, data) {
// if (error) throw error;
data = iris;
var domainByTrait = {},
traits = d3.keys(data[0]).filter(function(d) { return d !== "species"; }),
n = traits.length;
traits.forEach(function(trait) {
domainByTrait[trait] = d3.extent(data, function(d) { return d[trait]; });
});
xAxis.tickSize(size * n);
yAxis.tickSize(-size * n);
var brush = d3.brush()
.on("start", brushstart)
.on("brush", brushmove)
.on("end", brushend);
var svg = d3.select("body").append("svg")
.attr("width", size * n + padding)
.attr("height", size * n + padding)
.append("g")
.attr("transform", "translate(" + padding + "," + padding / 2 + ")");
svg.selectAll(".x.axis")
.data(traits)
.enter().append("g")
.attr("class", "x axis")
.attr("transform", function(d, i) { return "translate(" + (n - i - 1) * size + ",0)"; })
.each(function(d) { x.domain(domainByTrait[d]); d3.select(this).call(xAxis); });
svg.selectAll(".y.axis")
.data(traits)
.enter().append("g")
.attr("class", "y axis")
.attr("transform", function(d, i) { return "translate(0," + i * size + ")"; })
.each(function(d) { y.domain(domainByTrait[d]); d3.select(this).call(yAxis); });
var cell = svg.selectAll(".cell")
.data(cross(traits, traits))
.enter().append("g")
.attr("class", "cell")
.attr("transform", function(d) { return "translate(" + (n - d.i - 1) * size + "," + d.j * size + ")"; })
.each(plot);
// Titles for the diagonal.
cell.filter(function(d) { return d.i === d.j; }).append("text")
.attr("x", padding)
.attr("y", padding)
.attr("dy", ".71em")
.text(function(d) { return d.x; });
cell.call(brush);
function plot(p) {
var cell = d3.select(this);
x.domain(domainByTrait[p.x]);
y.domain(domainByTrait[p.y]);
cell.append("rect")
.attr("class", "frame")
.attr("x", padding / 2)
.attr("y", padding / 2)
.attr("width", size - padding)
.attr("height", size - padding);
cell.selectAll("circle")
.data(data)
.enter().append("circle")
.attr("cx", function(d) { return x(d[p.x]); })
.attr("cy", function(d) { return y(d[p.y]); })
.attr("r", 4)
.style("fill", function(d) { return color(d.species); });
}
var brushCell;
// Clear the previously-active brush, if any.
function brushstart(p) {
if (brushCell !== this) {
d3.select(brushCell).call(brush.move, null);
x.domain(domainByTrait[p.x]);
y.domain(domainByTrait[p.y]);
brushCell = this;
}
}
// Highlight the selected circles.
function brushmove(p) {
// ??
console.log(p.i +" " + p.j)
}
// If the brush is empty, select all circles.
function brushend(p) {
if (!d3.event.selection) svg.selectAll(".hidden").classed("hidden", false);
}
//});
function cross(a, b) {
var c = [], n = a.length, m = b.length, i, j;
for (i = -1; ++i < n;) for (j = -1; ++j < m;) c.push({x: a[i], i: i, y: b[j], j: j});
return c;
}
该代码与 iris 对象一起在 JSFiddle 上进行审核:https://jsfiddle.net/fabio_p/pmpjawmm/
注意函数brushstart中定义的变量brushcell也是错误的(提示是传给刷函数的"this"是错误的)
甚至更奇怪(至少对我没有经验的人来说),如果我改变我添加单元格的顺序,事情似乎会以更好的方式进行,正如你在另一个 fiddle 中看到的那样:https://jsfiddle.net/fabio_p/7pf4cqrg/
在这里,我只是更改了第 220 行的索引(以及第 206 行的比例一致性),并且索引 i 不再停留在 3...
关于我做错了什么或 D3 哪里出错的任何见解?
d3 没有问题,您的代码中只有两个小问题。
1) 从 v3 到 v4 的移动(如 CHANGELOG 中所述)添加了 .extent()
方法来表示选择区域。默认范围回退到 svg 的大小。如果您查看每个覆盖对象,它们都是整个 svg 文档的大小,这就是导致您的索引不稳定的原因。简单的解决方法是设置范围,
var brush = d3.brush()
.on("start", brushstart)
.on("brush", brushmove)
.on("end", brushend)
.extent([[0, 0], [size, size]]);
现在,当您进行选择时,区域再次限制在每个图形中,并且它们具有正确的索引。
问题 2)
由于从使用比例变为使用坐标,您需要将选择范围内的绝对坐标转换为您的比例,如上面链接的更改日志中所述,这可以在定义的比例上使用 .invert()
来完成。
// Highlight the selected circles.
function brushmove(p) {
if(d3.event.selection){
var e = d3.event.selection;
svg.selectAll("circle").classed("hidden", function(d) {
return x.invert(e[0][0]) > d[p.x] || x.invert(e[1][0]) < d[p.x]
|| y.invert(e[0][1]) < d[p.y] || y.invert(e[1][1]) > d[p.y];
});
}
}
加入这两个修复程序让我们恢复到正确的功能,
iris = [{
"sepal.length": "5.1",
"sepal.width": "3.5",
"petal.length": "1.4",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "4.9",
"sepal.width": "3",
"petal.length": "1.4",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "4.7",
"sepal.width": "3.2",
"petal.length": "1.3",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "4.6",
"sepal.width": "3.1",
"petal.length": "1.5",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5",
"sepal.width": "3.6",
"petal.length": "1.4",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "4.9",
"sepal.width": "3.1",
"petal.length": "1.5",
"petal.width": "0.1",
"species": "setosa"
}, {
"sepal.length": "5.4",
"sepal.width": "3.7",
"petal.length": "1.5",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "4.8",
"sepal.width": "3.4",
"petal.length": "1.6",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "4.8",
"sepal.width": "3",
"petal.length": "1.4",
"petal.width": "0.1",
"species": "setosa"
}, {
"sepal.length": "4.3",
"sepal.width": "3",
"petal.length": "1.1",
"petal.width": "0.1",
"species": "setosa"
}, {
"sepal.length": "5.8",
"sepal.width": "4",
"petal.length": "1.2",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5.7",
"sepal.width": "4.4",
"petal.length": "1.5",
"petal.width": "0.4",
"species": "setosa"
}, {
"sepal.length": "5.4",
"sepal.width": "3.9",
"petal.length": "1.3",
"petal.width": "0.4",
"species": "setosa"
}, {
"sepal.length": "5.1",
"sepal.width": "3.5",
"petal.length": "1.4",
"petal.width": "0.3",
"species": "setosa"
}, {
"sepal.length": "5.7",
"sepal.width": "3.8",
"petal.length": "1.7",
"petal.width": "0.3",
"species": "setosa"
}, {
"sepal.length": "5.1",
"sepal.width": "3.8",
"petal.length": "1.5",
"petal.width": "0.3",
"species": "setosa"
}, {
"sepal.length": "5.4",
"sepal.width": "3.4",
"petal.length": "1.7",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5.1",
"sepal.width": "3.7",
"petal.length": "1.5",
"petal.width": "0.4",
"species": "setosa"
}, {
"sepal.length": "4.6",
"sepal.width": "3.6",
"petal.length": "1",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5.1",
"sepal.width": "3.3",
"petal.length": "1.7",
"petal.width": "0.5",
"species": "setosa"
}, {
"sepal.length": "4.8",
"sepal.width": "3.4",
"petal.length": "1.9",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5",
"sepal.width": "3",
"petal.length": "1.6",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5",
"sepal.width": "3.4",
"petal.length": "1.6",
"petal.width": "0.4",
"species": "setosa"
}, {
"sepal.length": "5.2",
"sepal.width": "3.5",
"petal.length": "1.5",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5.2",
"sepal.width": "3.4",
"petal.length": "1.4",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "4.7",
"sepal.width": "3.2",
"petal.length": "1.6",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "4.8",
"sepal.width": "3.1",
"petal.length": "1.6",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5.4",
"sepal.width": "3.4",
"petal.length": "1.5",
"petal.width": "0.4",
"species": "setosa"
}, {
"sepal.length": "5.2",
"sepal.width": "4.1",
"petal.length": "1.5",
"petal.width": "0.1",
"species": "setosa"
}, {
"sepal.length": "5.5",
"sepal.width": "4.2",
"petal.length": "1.4",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "4.9",
"sepal.width": "3.1",
"petal.length": "1.5",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5",
"sepal.width": "3.2",
"petal.length": "1.2",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5.5",
"sepal.width": "3.5",
"petal.length": "1.3",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "4.9",
"sepal.width": "3.6",
"petal.length": "1.4",
"petal.width": "0.1",
"species": "setosa"
}, {
"sepal.length": "4.4",
"sepal.width": "3",
"petal.length": "1.3",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5.1",
"sepal.width": "3.4",
"petal.length": "1.5",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5",
"sepal.width": "3.5",
"petal.length": "1.3",
"petal.width": "0.3",
"species": "setosa"
}, {
"sepal.length": "4.5",
"sepal.width": "2.3",
"petal.length": "1.3",
"petal.width": "0.3",
"species": "setosa"
}, {
"sepal.length": "4.4",
"sepal.width": "3.2",
"petal.length": "1.3",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5",
"sepal.width": "3.5",
"petal.length": "1.6",
"petal.width": "0.6",
"species": "setosa"
}, {
"sepal.length": "5.1",
"sepal.width": "3.8",
"petal.length": "1.9",
"petal.width": "0.4",
"species": "setosa"
}, {
"sepal.length": "4.8",
"sepal.width": "3",
"petal.length": "1.4",
"petal.width": "0.3",
"species": "setosa"
}, {
"sepal.length": "5.1",
"sepal.width": "3.8",
"petal.length": "1.6",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "4.6",
"sepal.width": "3.2",
"petal.length": "1.4",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5.3",
"sepal.width": "3.7",
"petal.length": "1.5",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5",
"sepal.width": "3.3",
"petal.length": "1.4",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "7",
"sepal.width": "3.2",
"petal.length": "4.7",
"petal.width": "1.4",
"species": "versicolor"
}, {
"sepal.length": "6.4",
"sepal.width": "3.2",
"petal.length": "4.5",
"petal.width": "1.5",
"species": "versicolor"
}, {
"sepal.length": "6.9",
"sepal.width": "3.1",
"petal.length": "4.9",
"petal.width": "1.5",
"species": "versicolor"
}, {
"sepal.length": "5.5",
"sepal.width": "2.3",
"petal.length": "4",
"petal.width": "1.3",
"species": "versicolor"
}, {
"sepal.length": "6.5",
"sepal.width": "2.8",
"petal.length": "4.6",
"petal.width": "1.5",
"species": "versicolor"
}, {
"sepal.length": "5.7",
"sepal.width": "2.8",
"petal.length": "4.5",
"petal.width": "1.3",
"species": "versicolor"
}, {
"sepal.length": "6.3",
"sepal.width": "3.3",
"petal.length": "4.7",
"petal.width": "1.6",
"species": "versicolor"
}, {
"sepal.length": "4.9",
"sepal.width": "2.4",
"petal.length": "3.3",
"petal.width": "1",
"species": "versicolor"
}, {
"sepal.length": "6.6",
"sepal.width": "2.9",
"petal.length": "4.6",
"petal.width": "1.3",
"species": "versicolor"
}, {
"sepal.length": "5.2",
"sepal.width": "2.7",
"petal.length": "3.9",
"petal.width": "1.4",
"species": "versicolor"
}, {
"sepal.length": "5",
"sepal.width": "2",
"petal.length": "3.5",
"petal.width": "1",
"species": "versicolor"
}, {
"sepal.length": "5.9",
"sepal.width": "3",
"petal.length": "4.2",
"petal.width": "1.5",
"species": "versicolor"
}, {
"sepal.length": "6",
"sepal.width": "2.2",
"petal.length": "4",
"petal.width": "1",
"species": "versicolor"
}, {
"sepal.length": "6.1",
"sepal.width": "2.9",
"petal.length": "4.7",
"petal.width": "1.4",
"species": "versicolor"
}, {
"sepal.length": "5.6",
"sepal.width": "2.9",
"petal.length": "3.6",
"petal.width": "1.3",
"species": "versicolor"
}, {
"sepal.length": "6.7",
"sepal.width": "3.1",
"petal.length": "4.4",
"petal.width": "1.4",
"species": "versicolor"
}, {
"sepal.length": "5.6",
"sepal.width": "3",
"petal.length": "4.5",
"petal.width": "1.5",
"species": "versicolor"
}, {
"sepal.length": "5.8",
"sepal.width": "2.7",
"petal.length": "4.1",
"petal.width": "1",
"species": "versicolor"
}, {
"sepal.length": "6.2",
"sepal.width": "2.2",
"petal.length": "4.5",
"petal.width": "1.5",
"species": "versicolor"
}, {
"sepal.length": "5.6",
"sepal.width": "2.5",
"petal.length": "3.9",
"petal.width": "1.1",
"species": "versicolor"
}, {
"sepal.length": "5.9",
"sepal.width": "3.2",
"petal.length": "4.8",
"petal.width": "1.8",
"species": "versicolor"
}, {
"sepal.length": "6.1",
"sepal.width": "2.8",
"petal.length": "4",
"petal.width": "1.3",
"species": "versicolor"
}, {
"sepal.length": "6.3",
"sepal.width": "2.5",
"petal.length": "4.9",
"petal.width": "1.5",
"species": "versicolor"
}, {
"sepal.length": "6.1",
"sepal.width": "2.8",
"petal.length": "4.7",
"petal.width": "1.2",
"species": "versicolor"
}, {
"sepal.length": "6.4",
"sepal.width": "2.9",
"petal.length": "4.3",
"petal.width": "1.3",
"species": "versicolor"
}, {
"sepal.length": "6.6",
"sepal.width": "3",
"petal.length": "4.4",
"petal.width": "1.4",
"species": "versicolor"
}, {
"sepal.length": "6.8",
"sepal.width": "2.8",
"petal.length": "4.8",
"petal.width": "1.4",
"species": "versicolor"
}, {
"sepal.length": "6.7",
"sepal.width": "3",
"petal.length": "5",
"petal.width": "1.7",
"species": "versicolor"
}, {
"sepal.length": "6",
"sepal.width": "2.9",
"petal.length": "4.5",
"petal.width": "1.5",
"species": "versicolor"
}, {
"sepal.length": "5.7",
"sepal.width": "2.6",
"petal.length": "3.5",
"petal.width": "1",
"species": "versicolor"
}, {
"sepal.length": "5.5",
"sepal.width": "2.4",
"petal.length": "3.8",
"petal.width": "1.1",
"species": "versicolor"
}, {
"sepal.length": "5.5",
"sepal.width": "2.4",
"petal.length": "3.7",
"petal.width": "1",
"species": "versicolor"
}, {
"sepal.length": "5.8",
"sepal.width": "2.7",
"petal.length": "3.9",
"petal.width": "1.2",
"species": "versicolor"
}, {
"sepal.length": "6",
"sepal.width": "2.7",
"petal.length": "5.1",
"petal.width": "1.6",
"species": "versicolor"
}, {
"sepal.length": "5.4",
"sepal.width": "3",
"petal.length": "4.5",
"petal.width": "1.5",
"species": "versicolor"
}, {
"sepal.length": "6",
"sepal.width": "3.4",
"petal.length": "4.5",
"petal.width": "1.6",
"species": "versicolor"
}, {
"sepal.length": "6.7",
"sepal.width": "3.1",
"petal.length": "4.7",
"petal.width": "1.5",
"species": "versicolor"
}, {
"sepal.length": "6.3",
"sepal.width": "2.3",
"petal.length": "4.4",
"petal.width": "1.3",
"species": "versicolor"
}, {
"sepal.length": "5.6",
"sepal.width": "3",
"petal.length": "4.1",
"petal.width": "1.3",
"species": "versicolor"
}, {
"sepal.length": "5.5",
"sepal.width": "2.5",
"petal.length": "4",
"petal.width": "1.3",
"species": "versicolor"
}, {
"sepal.length": "5.5",
"sepal.width": "2.6",
"petal.length": "4.4",
"petal.width": "1.2",
"species": "versicolor"
}, {
"sepal.length": "6.1",
"sepal.width": "3",
"petal.length": "4.6",
"petal.width": "1.4",
"species": "versicolor"
}, {
"sepal.length": "5.8",
"sepal.width": "2.6",
"petal.length": "4",
"petal.width": "1.2",
"species": "versicolor"
}, {
"sepal.length": "5",
"sepal.width": "2.3",
"petal.length": "3.3",
"petal.width": "1",
"species": "versicolor"
}, {
"sepal.length": "5.6",
"sepal.width": "2.7",
"petal.length": "4.2",
"petal.width": "1.3",
"species": "versicolor"
}, {
"sepal.length": "5.7",
"sepal.width": "3",
"petal.length": "4.2",
"petal.width": "1.2",
"species": "versicolor"
}, {
"sepal.length": "5.7",
"sepal.width": "2.9",
"petal.length": "4.2",
"petal.width": "1.3",
"species": "versicolor"
}, {
"sepal.length": "6.2",
"sepal.width": "2.9",
"petal.length": "4.3",
"petal.width": "1.3",
"species": "versicolor"
}, {
"sepal.length": "5.1",
"sepal.width": "2.5",
"petal.length": "3",
"petal.width": "1.1",
"species": "versicolor"
}, {
"sepal.length": "5.7",
"sepal.width": "2.8",
"petal.length": "4.1",
"petal.width": "1.3",
"species": "versicolor"
}, {
"sepal.length": "6.3",
"sepal.width": "3.3",
"petal.length": "6",
"petal.width": "2.5",
"species": "virginica"
}, {
"sepal.length": "5.8",
"sepal.width": "2.7",
"petal.length": "5.1",
"petal.width": "1.9",
"species": "virginica"
}, {
"sepal.length": "7.1",
"sepal.width": "3",
"petal.length": "5.9",
"petal.width": "2.1",
"species": "virginica"
}, {
"sepal.length": "6.3",
"sepal.width": "2.9",
"petal.length": "5.6",
"petal.width": "1.8",
"species": "virginica"
}, {
"sepal.length": "6.5",
"sepal.width": "3",
"petal.length": "5.8",
"petal.width": "2.2",
"species": "virginica"
}, {
"sepal.length": "7.6",
"sepal.width": "3",
"petal.length": "6.6",
"petal.width": "2.1",
"species": "virginica"
}, {
"sepal.length": "4.9",
"sepal.width": "2.5",
"petal.length": "4.5",
"petal.width": "1.7",
"species": "virginica"
}, {
"sepal.length": "7.3",
"sepal.width": "2.9",
"petal.length": "6.3",
"petal.width": "1.8",
"species": "virginica"
}, {
"sepal.length": "6.7",
"sepal.width": "2.5",
"petal.length": "5.8",
"petal.width": "1.8",
"species": "virginica"
}, {
"sepal.length": "7.2",
"sepal.width": "3.6",
"petal.length": "6.1",
"petal.width": "2.5",
"species": "virginica"
}, {
"sepal.length": "6.5",
"sepal.width": "3.2",
"petal.length": "5.1",
"petal.width": "2",
"species": "virginica"
}, {
"sepal.length": "6.4",
"sepal.width": "2.7",
"petal.length": "5.3",
"petal.width": "1.9",
"species": "virginica"
}, {
"sepal.length": "6.8",
"sepal.width": "3",
"petal.length": "5.5",
"petal.width": "2.1",
"species": "virginica"
}, {
"sepal.length": "5.7",
"sepal.width": "2.5",
"petal.length": "5",
"petal.width": "2",
"species": "virginica"
}, {
"sepal.length": "5.8",
"sepal.width": "2.8",
"petal.length": "5.1",
"petal.width": "2.4",
"species": "virginica"
}, {
"sepal.length": "6.4",
"sepal.width": "3.2",
"petal.length": "5.3",
"petal.width": "2.3",
"species": "virginica"
}, {
"sepal.length": "6.5",
"sepal.width": "3",
"petal.length": "5.5",
"petal.width": "1.8",
"species": "virginica"
}, {
"sepal.length": "7.7",
"sepal.width": "3.8",
"petal.length": "6.7",
"petal.width": "2.2",
"species": "virginica"
}, {
"sepal.length": "7.7",
"sepal.width": "2.6",
"petal.length": "6.9",
"petal.width": "2.3",
"species": "virginica"
}, {
"sepal.length": "6",
"sepal.width": "2.2",
"petal.length": "5",
"petal.width": "1.5",
"species": "virginica"
}, {
"sepal.length": "6.9",
"sepal.width": "3.2",
"petal.length": "5.7",
"petal.width": "2.3",
"species": "virginica"
}, {
"sepal.length": "5.6",
"sepal.width": "2.8",
"petal.length": "4.9",
"petal.width": "2",
"species": "virginica"
}, {
"sepal.length": "7.7",
"sepal.width": "2.8",
"petal.length": "6.7",
"petal.width": "2",
"species": "virginica"
}, {
"sepal.length": "6.3",
"sepal.width": "2.7",
"petal.length": "4.9",
"petal.width": "1.8",
"species": "virginica"
}, {
"sepal.length": "6.7",
"sepal.width": "3.3",
"petal.length": "5.7",
"petal.width": "2.1",
"species": "virginica"
}, {
"sepal.length": "7.2",
"sepal.width": "3.2",
"petal.length": "6",
"petal.width": "1.8",
"species": "virginica"
}, {
"sepal.length": "6.2",
"sepal.width": "2.8",
"petal.length": "4.8",
"petal.width": "1.8",
"species": "virginica"
}, {
"sepal.length": "6.1",
"sepal.width": "3",
"petal.length": "4.9",
"petal.width": "1.8",
"species": "virginica"
}, {
"sepal.length": "6.4",
"sepal.width": "2.8",
"petal.length": "5.6",
"petal.width": "2.1",
"species": "virginica"
}, {
"sepal.length": "7.2",
"sepal.width": "3",
"petal.length": "5.8",
"petal.width": "1.6",
"species": "virginica"
}, {
"sepal.length": "7.4",
"sepal.width": "2.8",
"petal.length": "6.1",
"petal.width": "1.9",
"species": "virginica"
}, {
"sepal.length": "7.9",
"sepal.width": "3.8",
"petal.length": "6.4",
"petal.width": "2",
"species": "virginica"
}, {
"sepal.length": "6.4",
"sepal.width": "2.8",
"petal.length": "5.6",
"petal.width": "2.2",
"species": "virginica"
}, {
"sepal.length": "6.3",
"sepal.width": "2.8",
"petal.length": "5.1",
"petal.width": "1.5",
"species": "virginica"
}, {
"sepal.length": "6.1",
"sepal.width": "2.6",
"petal.length": "5.6",
"petal.width": "1.4",
"species": "virginica"
}, {
"sepal.length": "7.7",
"sepal.width": "3",
"petal.length": "6.1",
"petal.width": "2.3",
"species": "virginica"
}, {
"sepal.length": "6.3",
"sepal.width": "3.4",
"petal.length": "5.6",
"petal.width": "2.4",
"species": "virginica"
}, {
"sepal.length": "6.4",
"sepal.width": "3.1",
"petal.length": "5.5",
"petal.width": "1.8",
"species": "virginica"
}, {
"sepal.length": "6",
"sepal.width": "3",
"petal.length": "4.8",
"petal.width": "1.8",
"species": "virginica"
}, {
"sepal.length": "6.9",
"sepal.width": "3.1",
"petal.length": "5.4",
"petal.width": "2.1",
"species": "virginica"
}, {
"sepal.length": "6.7",
"sepal.width": "3.1",
"petal.length": "5.6",
"petal.width": "2.4",
"species": "virginica"
}, {
"sepal.length": "6.9",
"sepal.width": "3.1",
"petal.length": "5.1",
"petal.width": "2.3",
"species": "virginica"
}, {
"sepal.length": "5.8",
"sepal.width": "2.7",
"petal.length": "5.1",
"petal.width": "1.9",
"species": "virginica"
}, {
"sepal.length": "6.8",
"sepal.width": "3.2",
"petal.length": "5.9",
"petal.width": "2.3",
"species": "virginica"
}, {
"sepal.length": "6.7",
"sepal.width": "3.3",
"petal.length": "5.7",
"petal.width": "2.5",
"species": "virginica"
}, {
"sepal.length": "6.7",
"sepal.width": "3",
"petal.length": "5.2",
"petal.width": "2.3",
"species": "virginica"
}, {
"sepal.length": "6.3",
"sepal.width": "2.5",
"petal.length": "5",
"petal.width": "1.9",
"species": "virginica"
}, {
"sepal.length": "6.5",
"sepal.width": "3",
"petal.length": "5.2",
"petal.width": "2",
"species": "virginica"
}, {
"sepal.length": "6.2",
"sepal.width": "3.4",
"petal.length": "5.4",
"petal.width": "2.3",
"species": "virginica"
}, {
"sepal.length": "5.9",
"sepal.width": "3",
"petal.length": "5.1",
"petal.width": "1.8",
"species": "virginica"
}];
var width = 960,
size = 230,
padding = 20;
var x = d3.scaleLinear()
.range([padding / 2, size - padding / 2]);
var y = d3.scaleLinear()
.range([size - padding / 2, padding / 2]);
var xAxis = d3.axisBottom()
.scale(x)
.ticks(6);
var yAxis = d3.axisLeft()
.scale(y)
.ticks(6);
var color = d3.scaleOrdinal(d3.schemeCategory10);
//d3.csv("flowers.csv", function(error, data) {
// if (error) throw error;
data = iris;
var domainByTrait = {},
traits = d3.keys(data[0]).filter(function(d) {
return d !== "species";
}),
n = traits.length;
traits.forEach(function(trait) {
domainByTrait[trait] = d3.extent(data, function(d) {
return d[trait];
});
});
xAxis.tickSize(size * n);
yAxis.tickSize(-size * n);
var brush = d3.brush()
.on("start", brushstart)
.on("brush", brushmove)
.on("end", brushend)
.extent([
[0, 0],
[size, size]
]);
var svg = d3.select("body").append("svg")
.attr("width", size * n + padding)
.attr("height", size * n + padding)
.append("g")
.attr("transform", "translate(" + padding + "," + padding / 2 + ")");
svg.selectAll(".x.axis")
.data(traits)
.enter().append("g")
.attr("class", "x axis")
.attr("transform", function(d, i) {
return "translate(" + (n - i - 1) * size + ",0)";
})
.each(function(d) {
x.domain(domainByTrait[d]);
d3.select(this).call(xAxis);
});
svg.selectAll(".y.axis")
.data(traits)
.enter().append("g")
.attr("class", "y axis")
.attr("transform", function(d, i) {
return "translate(0," + i * size + ")";
})
.each(function(d) {
y.domain(domainByTrait[d]);
d3.select(this).call(yAxis);
});
var cell = svg.selectAll(".cell")
.data(cross(traits, traits))
.enter().append("g")
.attr("class", "cell")
.attr("transform", function(d) {
return "translate(" + (n - d.i - 1) * size + "," + d.j * size + ")";
})
.each(plot);
// Titles for the diagonal.
cell.filter(function(d) {
return d.i === d.j;
}).append("text")
.attr("x", padding)
.attr("y", padding)
.attr("dy", ".71em")
.text(function(d) {
return d.x;
});
cell.call(brush);
//console.log(traits.map(function(d) { return domainByTrait[d];}));
function plot(p) {
var cell = d3.select(this);
x.domain(domainByTrait[p.x]);
y.domain(domainByTrait[p.y]);
cell.append("rect")
.attr("class", "frame")
.attr("x", padding / 2)
.attr("y", padding / 2)
.attr("width", size - padding)
.attr("height", size - padding);
cell.selectAll("circle")
.data(data)
.enter().append("circle")
.attr("cx", function(d) {
return x(d[p.x]);
})
.attr("cy", function(d) {
return y(d[p.y]);
})
.attr("r", 4)
.style("fill", function(d) {
return color(d.species);
});
}
var brushCell;
// Clear the previously-active brush, if any.
function brushstart(p) {
if (brushCell !== this) {
d3.select(brushCell).call(brush.move, null);
x.domain(domainByTrait[p.x]);
y.domain(domainByTrait[p.y]);
brushCell = this;
}
}
// Highlight the selected circles.
function brushmove(p) {
if (d3.event.selection) {
var e = d3.event.selection;
svg.selectAll("circle").classed("hidden", function(d) {
return x.invert(e[0][0]) > d[p.x] || x.invert(e[1][0]) < d[p.x] || y.invert(e[0][1]) < d[p.y] || y.invert(e[1][1]) > d[p.y];
});
}
}
// If the brush is empty, select all circles.
function brushend(p) {
if (!d3.event.selection) svg.selectAll(".hidden").classed("hidden", false);
}
//});
function cross(a, b) {
var c = [],
n = a.length,
m = b.length,
i, j;
for (i = -1; ++i < n;)
for (j = -1; ++j < m;) c.push({
x: a[i],
i: i,
y: b[j],
j: j
});
return c;
}
svg {
font: 10px sans-serif;
padding: 10px;
}
.axis,
.frame {
shape-rendering: crispEdges;
}
.axis line {
stroke: #ddd;
}
.axis path {
display: none;
}
.cell text {
font-weight: bold;
text-transform: capitalize;
}
.frame {
fill: none;
stroke: #aaa;
}
circle {
fill-opacity: .7;
}
circle.hidden {
fill: #ccc !important;
}
.extent {
fill: #000;
fill-opacity: .125;
stroke: #fff;
}
<!DOCTYPE html>
<body>
<script src="//d3js.org/d3.v4.min.js"></script>
</body>
我正在尝试通过将我感兴趣的各种 v3 脚本更新为 v4 来提高 D3.js 的技能,但是我在尝试 "port" Mike 的交互式散点图矩阵时遇到了困难Bostok 发帖于此:https://bl.ocks.org/mbostock/4063663
虽然我已经毫无问题地移植了代码的静态版本(没有画笔),但当我尝试以与 v3 相同的方式实现画笔时,我发现了一个似乎是实际 D3 问题的问题不仅仅是与我的 D3 noob-ness 相关:刷子似乎粘在散点图矩阵上的错误单元格上! 特别是,如果我删除了 brushmove 部分并且我只是记录以控制数量 p.i 和 p.j(它们标识我们正在刷的散点图矩阵中的哪个单元格),我卡住了 i = 3指数.
var width = 960,
size = 230,
padding = 20;
var x = d3.scaleLinear()
.range([padding / 2, size - padding / 2]);
var y = d3.scaleLinear()
.range([size - padding / 2, padding / 2]);
var xAxis = d3.axisBottom()
.scale(x)
.ticks(6);
var yAxis = d3.axisLeft()
.scale(y)
.ticks(6);
var color = d3.scaleOrdinal(d3.schemeCategory10);
//d3.csv("flowers.csv", function(error, data) {
// if (error) throw error;
data = iris;
var domainByTrait = {},
traits = d3.keys(data[0]).filter(function(d) { return d !== "species"; }),
n = traits.length;
traits.forEach(function(trait) {
domainByTrait[trait] = d3.extent(data, function(d) { return d[trait]; });
});
xAxis.tickSize(size * n);
yAxis.tickSize(-size * n);
var brush = d3.brush()
.on("start", brushstart)
.on("brush", brushmove)
.on("end", brushend);
var svg = d3.select("body").append("svg")
.attr("width", size * n + padding)
.attr("height", size * n + padding)
.append("g")
.attr("transform", "translate(" + padding + "," + padding / 2 + ")");
svg.selectAll(".x.axis")
.data(traits)
.enter().append("g")
.attr("class", "x axis")
.attr("transform", function(d, i) { return "translate(" + (n - i - 1) * size + ",0)"; })
.each(function(d) { x.domain(domainByTrait[d]); d3.select(this).call(xAxis); });
svg.selectAll(".y.axis")
.data(traits)
.enter().append("g")
.attr("class", "y axis")
.attr("transform", function(d, i) { return "translate(0," + i * size + ")"; })
.each(function(d) { y.domain(domainByTrait[d]); d3.select(this).call(yAxis); });
var cell = svg.selectAll(".cell")
.data(cross(traits, traits))
.enter().append("g")
.attr("class", "cell")
.attr("transform", function(d) { return "translate(" + (n - d.i - 1) * size + "," + d.j * size + ")"; })
.each(plot);
// Titles for the diagonal.
cell.filter(function(d) { return d.i === d.j; }).append("text")
.attr("x", padding)
.attr("y", padding)
.attr("dy", ".71em")
.text(function(d) { return d.x; });
cell.call(brush);
function plot(p) {
var cell = d3.select(this);
x.domain(domainByTrait[p.x]);
y.domain(domainByTrait[p.y]);
cell.append("rect")
.attr("class", "frame")
.attr("x", padding / 2)
.attr("y", padding / 2)
.attr("width", size - padding)
.attr("height", size - padding);
cell.selectAll("circle")
.data(data)
.enter().append("circle")
.attr("cx", function(d) { return x(d[p.x]); })
.attr("cy", function(d) { return y(d[p.y]); })
.attr("r", 4)
.style("fill", function(d) { return color(d.species); });
}
var brushCell;
// Clear the previously-active brush, if any.
function brushstart(p) {
if (brushCell !== this) {
d3.select(brushCell).call(brush.move, null);
x.domain(domainByTrait[p.x]);
y.domain(domainByTrait[p.y]);
brushCell = this;
}
}
// Highlight the selected circles.
function brushmove(p) {
// ??
console.log(p.i +" " + p.j)
}
// If the brush is empty, select all circles.
function brushend(p) {
if (!d3.event.selection) svg.selectAll(".hidden").classed("hidden", false);
}
//});
function cross(a, b) {
var c = [], n = a.length, m = b.length, i, j;
for (i = -1; ++i < n;) for (j = -1; ++j < m;) c.push({x: a[i], i: i, y: b[j], j: j});
return c;
}
该代码与 iris 对象一起在 JSFiddle 上进行审核:https://jsfiddle.net/fabio_p/pmpjawmm/
注意函数brushstart中定义的变量brushcell也是错误的(提示是传给刷函数的"this"是错误的)
甚至更奇怪(至少对我没有经验的人来说),如果我改变我添加单元格的顺序,事情似乎会以更好的方式进行,正如你在另一个 fiddle 中看到的那样:https://jsfiddle.net/fabio_p/7pf4cqrg/ 在这里,我只是更改了第 220 行的索引(以及第 206 行的比例一致性),并且索引 i 不再停留在 3...
关于我做错了什么或 D3 哪里出错的任何见解?
d3 没有问题,您的代码中只有两个小问题。
1) 从 v3 到 v4 的移动(如 CHANGELOG 中所述)添加了 .extent()
方法来表示选择区域。默认范围回退到 svg 的大小。如果您查看每个覆盖对象,它们都是整个 svg 文档的大小,这就是导致您的索引不稳定的原因。简单的解决方法是设置范围,
var brush = d3.brush()
.on("start", brushstart)
.on("brush", brushmove)
.on("end", brushend)
.extent([[0, 0], [size, size]]);
现在,当您进行选择时,区域再次限制在每个图形中,并且它们具有正确的索引。
问题 2)
由于从使用比例变为使用坐标,您需要将选择范围内的绝对坐标转换为您的比例,如上面链接的更改日志中所述,这可以在定义的比例上使用 .invert()
来完成。
// Highlight the selected circles.
function brushmove(p) {
if(d3.event.selection){
var e = d3.event.selection;
svg.selectAll("circle").classed("hidden", function(d) {
return x.invert(e[0][0]) > d[p.x] || x.invert(e[1][0]) < d[p.x]
|| y.invert(e[0][1]) < d[p.y] || y.invert(e[1][1]) > d[p.y];
});
}
}
加入这两个修复程序让我们恢复到正确的功能,
iris = [{
"sepal.length": "5.1",
"sepal.width": "3.5",
"petal.length": "1.4",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "4.9",
"sepal.width": "3",
"petal.length": "1.4",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "4.7",
"sepal.width": "3.2",
"petal.length": "1.3",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "4.6",
"sepal.width": "3.1",
"petal.length": "1.5",
"petal.width": "0.2",
"species": "setosa"
}, {
"sepal.length": "5",
"sepal.width": "3.6",
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}, {
"sepal.length": "7.7",
"sepal.width": "3",
"petal.length": "6.1",
"petal.width": "2.3",
"species": "virginica"
}, {
"sepal.length": "6.3",
"sepal.width": "3.4",
"petal.length": "5.6",
"petal.width": "2.4",
"species": "virginica"
}, {
"sepal.length": "6.4",
"sepal.width": "3.1",
"petal.length": "5.5",
"petal.width": "1.8",
"species": "virginica"
}, {
"sepal.length": "6",
"sepal.width": "3",
"petal.length": "4.8",
"petal.width": "1.8",
"species": "virginica"
}, {
"sepal.length": "6.9",
"sepal.width": "3.1",
"petal.length": "5.4",
"petal.width": "2.1",
"species": "virginica"
}, {
"sepal.length": "6.7",
"sepal.width": "3.1",
"petal.length": "5.6",
"petal.width": "2.4",
"species": "virginica"
}, {
"sepal.length": "6.9",
"sepal.width": "3.1",
"petal.length": "5.1",
"petal.width": "2.3",
"species": "virginica"
}, {
"sepal.length": "5.8",
"sepal.width": "2.7",
"petal.length": "5.1",
"petal.width": "1.9",
"species": "virginica"
}, {
"sepal.length": "6.8",
"sepal.width": "3.2",
"petal.length": "5.9",
"petal.width": "2.3",
"species": "virginica"
}, {
"sepal.length": "6.7",
"sepal.width": "3.3",
"petal.length": "5.7",
"petal.width": "2.5",
"species": "virginica"
}, {
"sepal.length": "6.7",
"sepal.width": "3",
"petal.length": "5.2",
"petal.width": "2.3",
"species": "virginica"
}, {
"sepal.length": "6.3",
"sepal.width": "2.5",
"petal.length": "5",
"petal.width": "1.9",
"species": "virginica"
}, {
"sepal.length": "6.5",
"sepal.width": "3",
"petal.length": "5.2",
"petal.width": "2",
"species": "virginica"
}, {
"sepal.length": "6.2",
"sepal.width": "3.4",
"petal.length": "5.4",
"petal.width": "2.3",
"species": "virginica"
}, {
"sepal.length": "5.9",
"sepal.width": "3",
"petal.length": "5.1",
"petal.width": "1.8",
"species": "virginica"
}];
var width = 960,
size = 230,
padding = 20;
var x = d3.scaleLinear()
.range([padding / 2, size - padding / 2]);
var y = d3.scaleLinear()
.range([size - padding / 2, padding / 2]);
var xAxis = d3.axisBottom()
.scale(x)
.ticks(6);
var yAxis = d3.axisLeft()
.scale(y)
.ticks(6);
var color = d3.scaleOrdinal(d3.schemeCategory10);
//d3.csv("flowers.csv", function(error, data) {
// if (error) throw error;
data = iris;
var domainByTrait = {},
traits = d3.keys(data[0]).filter(function(d) {
return d !== "species";
}),
n = traits.length;
traits.forEach(function(trait) {
domainByTrait[trait] = d3.extent(data, function(d) {
return d[trait];
});
});
xAxis.tickSize(size * n);
yAxis.tickSize(-size * n);
var brush = d3.brush()
.on("start", brushstart)
.on("brush", brushmove)
.on("end", brushend)
.extent([
[0, 0],
[size, size]
]);
var svg = d3.select("body").append("svg")
.attr("width", size * n + padding)
.attr("height", size * n + padding)
.append("g")
.attr("transform", "translate(" + padding + "," + padding / 2 + ")");
svg.selectAll(".x.axis")
.data(traits)
.enter().append("g")
.attr("class", "x axis")
.attr("transform", function(d, i) {
return "translate(" + (n - i - 1) * size + ",0)";
})
.each(function(d) {
x.domain(domainByTrait[d]);
d3.select(this).call(xAxis);
});
svg.selectAll(".y.axis")
.data(traits)
.enter().append("g")
.attr("class", "y axis")
.attr("transform", function(d, i) {
return "translate(0," + i * size + ")";
})
.each(function(d) {
y.domain(domainByTrait[d]);
d3.select(this).call(yAxis);
});
var cell = svg.selectAll(".cell")
.data(cross(traits, traits))
.enter().append("g")
.attr("class", "cell")
.attr("transform", function(d) {
return "translate(" + (n - d.i - 1) * size + "," + d.j * size + ")";
})
.each(plot);
// Titles for the diagonal.
cell.filter(function(d) {
return d.i === d.j;
}).append("text")
.attr("x", padding)
.attr("y", padding)
.attr("dy", ".71em")
.text(function(d) {
return d.x;
});
cell.call(brush);
//console.log(traits.map(function(d) { return domainByTrait[d];}));
function plot(p) {
var cell = d3.select(this);
x.domain(domainByTrait[p.x]);
y.domain(domainByTrait[p.y]);
cell.append("rect")
.attr("class", "frame")
.attr("x", padding / 2)
.attr("y", padding / 2)
.attr("width", size - padding)
.attr("height", size - padding);
cell.selectAll("circle")
.data(data)
.enter().append("circle")
.attr("cx", function(d) {
return x(d[p.x]);
})
.attr("cy", function(d) {
return y(d[p.y]);
})
.attr("r", 4)
.style("fill", function(d) {
return color(d.species);
});
}
var brushCell;
// Clear the previously-active brush, if any.
function brushstart(p) {
if (brushCell !== this) {
d3.select(brushCell).call(brush.move, null);
x.domain(domainByTrait[p.x]);
y.domain(domainByTrait[p.y]);
brushCell = this;
}
}
// Highlight the selected circles.
function brushmove(p) {
if (d3.event.selection) {
var e = d3.event.selection;
svg.selectAll("circle").classed("hidden", function(d) {
return x.invert(e[0][0]) > d[p.x] || x.invert(e[1][0]) < d[p.x] || y.invert(e[0][1]) < d[p.y] || y.invert(e[1][1]) > d[p.y];
});
}
}
// If the brush is empty, select all circles.
function brushend(p) {
if (!d3.event.selection) svg.selectAll(".hidden").classed("hidden", false);
}
//});
function cross(a, b) {
var c = [],
n = a.length,
m = b.length,
i, j;
for (i = -1; ++i < n;)
for (j = -1; ++j < m;) c.push({
x: a[i],
i: i,
y: b[j],
j: j
});
return c;
}
svg {
font: 10px sans-serif;
padding: 10px;
}
.axis,
.frame {
shape-rendering: crispEdges;
}
.axis line {
stroke: #ddd;
}
.axis path {
display: none;
}
.cell text {
font-weight: bold;
text-transform: capitalize;
}
.frame {
fill: none;
stroke: #aaa;
}
circle {
fill-opacity: .7;
}
circle.hidden {
fill: #ccc !important;
}
.extent {
fill: #000;
fill-opacity: .125;
stroke: #fff;
}
<!DOCTYPE html>
<body>
<script src="//d3js.org/d3.v4.min.js"></script>
</body>