Add VT2-examples: all 6 chapters of 'Visualize This' (110 files) — data scraping, ETL, trends, categorical, multivariate, spatial, distribution analysis

2026-06-24 14:49:15 +05:00
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commit b42b866a8c
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+// Dimensions of chart.
+let margin = { top: 20, right: 20, bottom: 50, left: 290 },
+    // width = parseInt(d3.select('#chart').style('width'), 10) - margin.left - margin.right,
+    width = 650 - margin.left - margin.right,
+    height = 550 - margin.top - margin.bottom;
+
+// Start SVG     
+let svg = d3.select("#chart").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 + ")");
+    
+// Scales: x and y
+let x = d3.scaleLinear()
+    .domain([0, 80])
+	.range([0, width]);
+let y = d3.scaleBand()
+    // .domain([3, 6])
+	.range([height, 0]);
+
+
+let activities;
+let xAxis, yAxis, xAxisEl, yAxisEl;
+let barbell;
+
+
+// Load data
+const activitiesData = Promise.all([
+    d3.tsv("data/hh-activities-withkids.tsv", d3.autoType)
+]);
+activitiesData.then(function(data) {
+    activities = data[0].sort((a, b) => a.pctkidsf - b.pctkidsf);
+    // console.log(activities);
+    
+    // Initialize chart now that data is loaded.
+    initChart();
+});
+
+
+function initChart() {
+    
+    // x-axis
+    xAxis = d3.axisBottom(x)
+        .tickFormat(d => d + "%")
+        .ticks(5)
+	    .tickSize(-height-8)
+	    .tickPadding(5);
+    xAxisEl = svg.append("g")
+	    .attr("class", "x axis bottom")
+	    .attr("transform", "translate(0,"+(height+8)+")");
+    xAxisEl.append("text")
+	    .attr("class", "axistitle")
+        .attr("text-anchor", "start")
+	    .attr("x", 0).attr("y", 0)
+	    .attr("dx", "-.75em").attr("dy", "2.5em")
+	    .text("Engaged in Activity");
+    xAxisEl.call(xAxis);
+
+
+    // y-axis
+    y.domain(activities.map(d => d.desc));
+    yAxis = d3.axisLeft(y)
+        .tickSize(0);
+    yAxisEl = svg.append("g")
+	    .attr("class", "y axis left")
+        .attr("transform", "translate("+(-8)+",0)");
+    yAxisEl.call(yAxis);
+    
+    
+    // barbells
+    barbell = svg.selectAll(".barbell")
+        .data(activities)
+        .join("g")
+        .attr("class", "barbell")
+        .attr("transform", d => 
+            "translate(0,"+(y(d.desc)+(y.bandwidth()/2))+")")
+        .attr("id", d => "act"+d.code);
+    
+    // connecting lines
+    barbell.append("line")
+        .attr("x1", d => x(d.pctkidsm))
+        .attr("x2", d => x(d.pctkidsf))
+        .attr("y1", 0).attr("y2", 0)
+        .attr("stroke", "#000000");
+    
+    // circles
+    barbell.append("circle")
+        .attr("class", "men")
+        .attr("cx", d => x(d.pctkidsm))
+        .attr("cy", 0)
+        .attr("r", 6);
+    barbell.append("circle")
+        .attr("class", "women")
+        .attr("cx", d => x(d.pctkidsf))
+        .attr("cy", 0)
+        .attr("r", 6);
+    
+    // labels
+    svg.append("text")
+        .attr("x", x(activities[14].pctkidsm))
+        .attr("y", y(activities[14].desc))
+        .attr("text-anchor", "middle")
+        .text("MEN");
+    svg.append("text")
+        .attr("x", x(activities[14].pctkidsf))
+        .attr("y", y(activities[14].desc))
+        .attr("text-anchor", "middle")
+        .text("WOMEN");
+}
+
+
+
+