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mcv02_piechart.html
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mcv02_piechart.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<title>Student's First Multiple Coordinated View</title>
<meta name="description" content="Student's First Multiple Coordinated View" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<script src="https://cdn.polyfill.io/v2/polyfill.min.js"></script>
<script src="../web_modules/d3/dist/d3.js"></script>
<link href="./mvc.css" rel="stylesheet" />
<style>
rect {
fill: steelblue;
fill-opacity: 0.8;
}
rect:hover {
fill-opacity: 1;
}
path {
fill-opacity: 0.8;
}
.selected,
path:hover {
fill-opacity: 1;
}
.axis {
font-size: smaller;
}
main {
display: flex;
flex-wrap: wrap;
}
h3 {
text-align: center;
}
</style>
</head>
<body>
<h1>Student's First Multiple Coordinated View</h1>
<div>
<label for="passenger-class"><strong>Passenger Class:</strong></label>
<select id="passenger-class">
<option value="" selected>All Classes</option>
<option value="1">First Class</option>
<option value="2">2nd Class</option>
<option value="3">3rd Class</option>
</select>
</div>
<main>
<section>
<h3>Gender Distribution</h3>
<svg id="sex"></svg>
</section>
<section>
<h3>Age Histogram</h3>
<svg id="age"></svg>
</section>
</main>
<script>
const state = {
data: [],
passengerClass: "",
};
function createHistogram(svgSelector) {
const margin = {
top: 40,
bottom: 10,
left: 120,
right: 20,
};
const width = 600 - margin.left - margin.right;
const height = 400 - margin.top - margin.bottom;
// Creates sources <svg> element
const svg = d3
.select(svgSelector)
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom);
// Group used to enforce margin
const g = svg.append("g").attr("transform", `translate(${margin.left},${margin.top})`);
// Scales setup
const xscale = d3.scaleLinear().range([0, width]);
const yscale = d3.scaleLinear().range([0, height]);
// Axis setup
const xaxis = d3.axisTop().scale(xscale);
const g_xaxis = g.append("g").attr("class", "x axis");
const yaxis = d3.axisLeft().scale(yscale);
const g_yaxis = g.append("g").attr("class", "y axis");
function update(new_data) {
//: (IPerson[] & {x0: number, x1: number})[]
//update the scales
xscale.domain([0, d3.max(new_data, (d) => d.length)]);
yscale.domain([new_data[0].x0, new_data[new_data.length - 1].x1]);
//render the axis
g_xaxis.transition().call(xaxis);
g_yaxis.transition().call(yaxis);
// Render the chart with new data
// DATA JOIN
// DATA JOIN
const rect = g
.selectAll("rect")
.data(new_data)
.join(
(enter) => {
// ENTER
// new elements
const rect_enter = enter
.append("rect")
.attr("x", 0) //set intelligent default values for animation
.attr("y", 0)
.attr("width", 0)
.attr("height", 0);
rect_enter.append("title");
return rect_enter;
},
// UPDATE
// update existing elements
(update) => update,
// EXIT
// elements that aren't associated with data
(exit) => exit.remove()
);
// ENTER + UPDATE
// both old and new elements
rect
.transition()
.attr("height", (d) => yscale(d.x1) - yscale(d.x0) - 2)
.attr("width", (d) => xscale(d.length))
.attr("y", (d) => yscale(d.x0) + 1);
rect.select("title").text((d) => `${d.x0}: ${d.length}`);
}
return update;
}
function createPieChart(svgSelector) {
const margin = 10;
const radius = 100;
// Creates sources <svg> element
const svg = d3
.select(svgSelector)
.attr("width", radius * 2 + margin * 2)
.attr("height", radius * 2 + margin * 2);
// Group used to enforce margin
const g = svg.append("g").attr("transform", `translate(${radius + margin},${radius + margin})`);
// 1. TODO
function update(new_data) {
//{key: string, values: IPerson[]}[]
// TODO apply layout and render pie
}
return update;
}
/////////////////////////
const ageHistogram = createHistogram("#age");
const sexPieChart = createPieChart("#sex");
function filterData() {
return state.data.filter((d) => {
if (state.passengerClass && d.pclass !== state.passengerClass) {
return false;
}
return true;
});
}
function wrangleData(filtered) {
const ageHistogram = d3
.bin()
.domain([0, 100])
.thresholds(10)
.value((d) => d.age);
const ageHistogramData = ageHistogram(filtered);
// always the two categories
const sexPieData = ["female", "male"].map((key) => ({
key,
values: filtered.filter((d) => d.sex === key),
}));
return { ageHistogramData, sexPieData };
}
function updateApp() {
const filtered = filterData();
const { ageHistogramData, sexPieData } = wrangleData(filtered);
ageHistogram(ageHistogramData);
sexPieChart(sexPieData);
}
d3.csv("titanic3.csv").then((parsed) => {
state.data = parsed.map((row) => {
row.age = parseInt(row.age, 10);
row.fare = parseFloat(row.fare);
return row;
});
updateApp();
});
//interactivity
d3.select("#passenger-class").on("change", function () {
const selected = d3.select(this).property("value");
state.passengerClass = selected;
updateApp();
});
</script>
</body>
</html>