嘗試使用畫筆/縮放在d3圖表中使用散點圖
[英]Trying to user scatterplots in a d3 chart with brush/zoom
問題描述
我目前正在嘗試學習d3，想做一個小項目，但是遇到了問題。 我一直以該圖塊為基礎： 畫筆和縮放
並用我的散點圖數據替換區域填充。 我能夠獲取要渲染的點，但是在第二軸上移動縮放/畫筆時，.focus圖表的x軸會變形，但我的散點圖卻沒有。 我嘗試了多種方法，包括查看是否將其附加到正確的svg元素上，但是由於我對D3的了解有限，所以我不太確定出什么問題了。 我的示例代碼如下：
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script> <!DOCTYPE html> <meta charset="utf-8"> <style> .area { fill: #FDB827; clip-path: url(#clip); } .zoom { cursor: move; fill: none; pointer-events: all; } </style> <svg width="960" height="500"></svg> <script src="https://d3js.org/d3.v4.min.js"></script> <script> var svg = d3.select("svg"), margin = {top: 20, right: 20, bottom: 110, left: 40}, margin2 = {top: 430, right: 20, bottom: 30, left: 40}, width = +svg.attr("width") - margin.left - margin.right, height = +svg.attr("height") - margin.top - margin.bottom, height2 = +svg.attr("height") - margin2.top - margin2.bottom; var parseDate = d3.timeParse("%b %Y"); var x = d3.scaleTime().range([0, width]), x2 = d3.scaleTime().range([0, width]), y = d3.scaleLinear().range([height, 0]), y2 = d3.scaleLinear().range([height2, 0]); var xAxis = d3.axisBottom(x), xAxis2 = d3.axisBottom(x2), yAxis = d3.axisLeft(y); var brush = d3.brushX() .extent([[0, 0], [width, height2]]) .on("brush end", brushed); var zoom = d3.zoom() .scaleExtent([1, Infinity]) .translateExtent([[0, 0], [width, height]]) .extent([[0, 0], [width, height]]) .on("zoom", zoomed); var area = d3.area() .curve(d3.curveMonotoneX) .x(function(d) { return x(d.date); }) .y0(height) .y1(function(d) { return y(d.PTS); }); var area2 = d3.area() .curve(d3.curveMonotoneX) .x(function(d) { return x2(d.date); }) .y0(height2) .y1(function(d) { return y2(d.PTS); }); svg.append("defs").append("clipPath") .attr("id", "clip") .append("rect") .attr("width", width) .attr("height", height); var focus = svg.append("g") .attr("class", "focus") .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); var context = svg.append("g") .attr("class", "context") .attr("transform", "translate(" + margin2.left + "," + margin2.top + ")"); d3.csv("./data/kobe-playoff1.csv", type, function(error, data) { if (error) throw error; x.domain(d3.extent(data, function(d) { return d.date; })); y.domain([0, d3.max(data, function(d) { return d.PTS; })]); x2.domain(x.domain()); y2.domain(y.domain()); let fixedData ={}; let arr = []; data.forEach((d)=>{ fixedData["date"] = d.date; fixedData["PTS"] = d.PTS; arr.push(fixedData); fixedData = {}; }) // focus.append("path") .datum(arr) .attr("class", "area") .attr("d", area); // draw dots focus.selectAll("circle") .data(data) .enter().append("circle") .attr("class", "brush") // .attr("class", "brush") .attr("r", (d)=>{return (d.PTS)}) .attr("cx", (d)=>{return x(d.date)}) .attr("cy", (d)=>{return y(d.PTS)}) .style("fill", "#552583"); // .on("mouseover", function(d) { // tooltip.transition() // .duration(200) // .style("opacity", .9); // tooltip.html(d["date"] + "<br/> (" + xValue(d) // + ", " + yValue(d) + ")") // .style("left", (d3.event.pageX + 5) + "px") // .style("top", (d3.event.pageY - 28) + "px"); // }) // .on("mouseout", function(d) { // tooltip.transition() // .duration(500) // .style("opacity", 0); // }); focus.append("g") .attr("class", "axis axis--x") .attr("transform", "translate(0," + height + ")") .call(xAxis); focus.append("g") .attr("class", "axis axis--y") .call(yAxis); context.append("path") .datum(data) .attr("class", "area") .attr("d", area2); context.append("g") .attr("class", "axis axis--x") .attr("transform", "translate(0," + height2 + ")") .call(xAxis2); context.append("g") .attr("class", "brush") .call(brush) .call(brush.move, x.range()); focus.append("g") .attr("class", "zoom") .attr("width", width) .attr("height", height) .attr("transform", "translate(" + margin.left + "," + margin.top + ")") .call(zoom); }); function brushed() { if (d3.event.sourceEvent && d3.event.sourceEvent.type === "zoom") return; // ignore brush-by-zoom var s = d3.event.selection || x2.range(); x.domain(s.map(x2.invert, x2)); focus.select(".area").attr("d", area); focus.select(".axis--x").call(xAxis); svg.select(".zoom").call(zoom.transform, d3.zoomIdentity .scale(width / (s[1] - s[0])) .translate(-s[0], 0)); } function zoomed() { if (d3.event.sourceEvent && d3.event.sourceEvent.type === "brush") return; // ignore zoom-by-brush var t = d3.event.transform; x.domain(t.rescaleX(x2).domain()); focus.select(".area").attr("d", area); focus.select(".axis--x").call(xAxis); context.select(".brush").call(brush.move, x.range().map(t.invertX, t)); } function type(d) { // d.date = parseDate(d.date); // d.price = +d.price; // d.date = new Date(d.Date); d.date = Date.parse(d.Date); d.PTS = +d.PTS; return d; } </script>
我正在使用的樣本數據如下：
Rk,G,Date,Age,Tm,,Opp,,GS,MP,FG,FGA,FG%,3P,3PA,3P%,FT,FTA,FT%,ORB,DRB,TRB,AST,STL,BLK,TOV,PF,PTS,GmSc 1,1,1997-04-25,18-245,LAL,,POR,W (+18),0,1:00,1,1,1.000,0,0,,0,0,,0,0,0,0,0,0,0,0,2,1.7 2,2,1997-04-27,18-247,LAL,,POR,W (+14),0,5:00,1,3,.333,0,1,.000,4,4,1.000,0,0,0,0,0,0,0,1,6,3.9 3,3,1997-04-30,18-250,LAL,@,POR,L (-8),0,27:00,7,13,.538,2,3,.667,6,8,.750,0,4,4,2,1,0,4,5,22,12.5 4,4,1997-05-02,18-252,LAL,@,POR,W (+4),0,6:00,0,0,,0,0,,0,0,,0,0,0,0,0,0,0,0,0,0.0 5,5,1997-05-04,18-254,LAL,@,UTA,L (-16),0,14:00,1,7,.143,1,5,.200,0,1,.000,1,1,2,3,0,1,0,5,3,-0.1 6,6,1997-05-06,18-256,LAL,@,UTA,L (-2),0,4:00,1,1,1.000,0,0,,0,0,,0,0,0,1,0,0,1,2,2,0.6 7,7,1997-05-08,18-258,LAL,,UTA,W (+20),0,19:00,3,7,.429,0,2,.000,13,14,.929,0,1,1,3,1,1,3,3,19,14.8 8,8,1997-05-10,18-260,LAL,,UTA,L (-15),0,28:00,3,9,.333,3,6,.500,0,0,,0,2,2,0,0,0,5,4,9,-2.1 9,9,1997-05-12,18-262,LAL,@,UTA,L (-5),0,29:00,4,14,.286,0,6,.000,3,3,1.000,0,2,2,2,1,0,1,3,11,3.6
任何幫助將不勝感激！ 謝謝。
1 個解決方案
解決方案1
1 已采納 2018-07-13 15:37:53
在筆刷和縮放功能中，您需要選擇圓並應用動態屬性。 但是在執行此操作之前，您需要為圈子重命名該類。 就像是：
// draw dots
focus.selectAll("circle")
.data(data)
.enter().append("circle")
.attr("class", "circle")
...
function brushed() {
if (d3.event.sourceEvent && d3.event.sourceEvent.type === "zoom") return; // ignore brush-by-zoom
var s = d3.event.selection || x2.range();
x.domain(s.map(x2.invert, x2));
focus.select(".area").attr("d", area);
focus.select(".axis--x").call(xAxis);
focus.selectAll(".circle")
.attr("r", (d)=>{return (d.PTS)})
.attr("cx", (d)=>{return x(d.date)})
.attr("cy", (d)=>{return y(d.PTS)})
svg.select(".zoom").call(zoom.transform, d3.zoomIdentity
.scale(width / (s[1] - s[0]))
.translate(-s[0], 0));
}
function zoomed() {
if (d3.event.sourceEvent && d3.event.sourceEvent.type === "brush") return; // ignore zoom-by-brush
var t = d3.event.transform;
x.domain(t.rescaleX(x2).domain());
focus.select(".area").attr("d", area);
focus.select(".axis--x").call(xAxis);
focus.selectAll(".circle")
.attr("r", (d)=>{return (d.PTS)})
.attr("cx", (d)=>{return x(d.date)})
.attr("cy", (d)=>{return y(d.PTS)})
context.select(".brush").call(brush.move, x.range().map(t.invertX, t));
}
在折線+條形圖中使用d3筆刷時出現問題（折線+條形圖放大）
[英]issue while using d3 brush in a line+bar chart (zoom in line+bar chart)
在我的 d3 圖表中，當我更改畫筆並單擊未選擇的范圍時，縮放選擇消失了
[英]In my d3 chart, Zoom selection disappears when I change the brush and click on not selected range
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