Created
October 11, 2011 05:21
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Parallel Coordinates Plot (first draft)
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.js"></script> | |
| </head> | |
| <body> | |
| <div id="viz"></div> | |
| <script type="text/javascript"> | |
| (function(){bio = {}; | |
| bio.pcp = { | |
| init : function(container, x, y, w, h){ | |
| // mock data | |
| var data = [], | |
| dataMax = 100, | |
| dataDim = [], | |
| axisNum = 5, | |
| polylineNum = 100; | |
| for(var i=0; i<axisNum; i++){ | |
| data[i] = []; | |
| for(var j=0; j<polylineNum; j++){ | |
| data[i][j] = ~~(Math.random()*dataMax); | |
| } | |
| dataDim.push("dimension"+i); | |
| } | |
| var container = container || "body", | |
| margin = 10, | |
| labelH = 20, | |
| axisH = h-margin*2-labelH, | |
| axisDist = w/data.length; | |
| var rootSVG = d3.select(container) | |
| .append("svg:svg") | |
| .attr("class", "pcp_root") | |
| .attr("width", w) | |
| .attr("height", h); | |
| var axisGroups = rootSVG.selectAll("g.axis_group") | |
| .data(data) | |
| .enter().append("svg:g") | |
| .attr("class", "axis_group") | |
| .each(function(parentD, parentI){ | |
| d3.select(this) | |
| .selectAll("circle.dot") | |
| .data(function(d, i){return d;}) | |
| .enter().append("svg:circle") | |
| .attr("class", "dot") | |
| .attr("cx", function(d, i){return parentI*axisDist+margin}) | |
| .attr("cy", function(d, i){return d/dataMax*axisH+margin}) | |
| .attr("r", 1); | |
| if(parentI < data.length-1){ | |
| d3.select(this) | |
| .selectAll("line.link") | |
| .data(function(d, i){return d;}) | |
| .enter().append("svg:line") | |
| .attr("class", "link") | |
| .attr("x1", function(d, i){return parentI*axisDist+margin}) | |
| .attr("y1", function(d, i){return d/dataMax*axisH+margin}) | |
| .attr("x2", function(d, i){return (parentI+1)*axisDist+margin}) | |
| .attr("y2", function(d, i){return data[parentI+1][i]/dataMax*axisH+margin}) | |
| .attr("stroke", "black") | |
| .attr("opacity", 0.5); | |
| } | |
| }); | |
| axisGroups.append("svg:line") | |
| .attr("class", "axis") | |
| .attr("x1", function(d, i){return i*axisDist+margin}) | |
| .attr("y1", margin) | |
| .attr("x2", function(d, i){return i*axisDist+margin}) | |
| .attr("y2", axisH+margin) | |
| .attr("stroke", "silver"); | |
| axisGroups.append("svg:rect") | |
| .attr("class", "label") | |
| .attr("x", function(d, i){return i*axisDist+margin}) | |
| .attr("y", axisH+margin+10) //offset hardcoded | |
| .attr("width", 80) //hardcoded | |
| .attr("height", labelH) | |
| .attr("stroke", "black") | |
| .attr("fill", "white"); | |
| axisGroups.append("svg:text") | |
| .attr("x", function(d, i){return i*axisDist+margin}) | |
| .attr("y", axisH+margin+labelH+5) //offset hardcoded | |
| .text(function(d, i){return dataDim[i];}) | |
| .style("pointer-events", "none"); | |
| //document.onselectstart = function(){return false;}; | |
| rootSVG.node().onselectstart = function(){return false;}; | |
| rootSVG.on("mousedown", addBrush) | |
| .on("mouseup", removeBrush); | |
| var brushStartValue = 0; | |
| var brushEndValue = dataMax; | |
| var axisIdx = null; | |
| function addBrush(){ | |
| rootSVG.on("mousemove", moveBrush); | |
| axisIdx = Math.round((event.offsetX-margin)/axisDist); | |
| rootSVG.append("svg:line") | |
| .attr("class", "slider") | |
| .attr("x1", axisIdx*axisDist+margin-20) | |
| .attr("y1", event.offsetY) | |
| .attr("x2", axisIdx*axisDist+margin+20) | |
| .attr("y2", event.offsetY) | |
| .attr("stroke", "black"); | |
| brushStartValue = event.offsetY; | |
| } | |
| function moveBrush(){ | |
| if(event.which != 1) return; | |
| rootSVG.select("line.slider") | |
| .attr("class", "slider") | |
| .attr("y1", Math.max(margin, Math.min(margin+axisH, event.offsetY))) | |
| .attr("y2", Math.max(margin, Math.min(margin+axisH, event.offsetY))) | |
| brushEndValue = event.offsetY; | |
| fadeUnselected(brushStartValue, brushEndValue); | |
| } | |
| function removeBrush(){ | |
| rootSVG.on("mousemove", null); | |
| d3.selectAll(".slider") | |
| .remove(); | |
| } | |
| function fadeUnselected(startX, endX){ | |
| d3.selectAll("line.link") | |
| .attr("opacity", function(d, i){ | |
| var indexJ = i%polylineNum; | |
| var dataAtTargetAxis = data[axisIdx][indexJ]; | |
| var y1 = dataAtTargetAxis/dataMax*axisH+margin; | |
| if(y1 > brushStartValue && y1 < brushEndValue) return 0.5; | |
| else return 0.1; | |
| }); | |
| } | |
| function moveAxis(){ | |
| //console.log(this.parentNode); | |
| } | |
| return this; | |
| } | |
| }; | |
| })(); | |
| bio.pcp.init("#viz", 0, 0, 600, 200); | |
| </script> | |
| </body> | |
| </html> |
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