AI Researcher in Medicine.
All opinions are my own.
viewof chart = {
const width = 600;
const height = 300;
const data = await FileAttachment("faithful.json").json();
let chartContainer = d3.create('div')
.attr('class', 'chart-container');
chartContainer.call(
boxPlot()
.width(width)
.height(height)
.margin({
top: 70,
right: 70,
bottom: 70,
left: 70,
})
.data(data)
.xMin(15)
.xMax(120)
.xLabel('Time between eruptions (minutes) →')
.title('Summary statistics of time between eruptions of Old Faithful')
.boxWidth(50)
.radius(5)
.hoverOffsetX(70)
.hoverOffsetY(55)
);
return chartContainer.node();
}
function boxPlot() {
let width;
let height;
let margin;
let data;
let xMin;
let xMax;
let xLabel;
let title;
let boxWidth;
let color = 'rgb(122, 255, 248, 0.7)';
let strokeWidth = 1.5;
let opacity = 1.0;
let radius;
let fontSize = 15;
let hoverOffsetX = 0;
let hoverOffsetY = 0;
let removeAxis = false;
const boxPlot = (selection) => {
const svg = selection
.selectAll('svg.box-plot')
.data([null])
.join('svg')
.attr('class', 'box-plot')
.attr('width', width)
.attr('height', height);
svg
.attr('font-family', 'sans-serif')
.attr('font-size', fontSize);
let xRange = d3.extent(data);
xRange[0] = xMin ?? xRange[0];
xRange[1] = xMax ?? xRange[1];
const x = d3.scaleLinear()
.domain(xRange)
.range([margin.left, width - margin.right]);
const q1 = d3.quantile(data, 0.25);
const q2 = d3.quantile(data, 0.5);
const q3 = d3.quantile(data, 0.75);
const iqr = q3 - q1;
let min = q1 - iqr * 1.5;
const dataMin = d3.min(data);
min = dataMin > min ? dataMin : min;
let max = q3 + iqr * 1.5;
const dataMax = d3.max(data);
max = dataMax < max ? dataMax : max;
const outliers = data.filter(d => (d < min) || (d > max));
const tooltip = selection.selectAll('div.tooltip')
.data([null])
.join('div')
.attr('class', 'tooltip')
.style('position', 'absolute')
.style('opacity', 0);
svg
.on('mouseover', function(event) {
const message = `
Minimum: ${min.toFixed(2)}<br>
25th percentile: ${q1.toFixed(2)}<br>
Median: ${q2.toFixed(2)}<br>
75th percentile: ${q3.toFixed(2)}<br>
Maximum: ${max.toFixed(2)}<br>
Inter-quartile range: ${iqr.toFixed(2)}
`;
tooltip
.style('opacity', 1)
.style('border-color', color)
.html(message);
})
.on('mouseout', () => {
tooltip
.style('opacity', 0);
})
.on('mousemove', function(event) {
tooltip
.style('left', (event.pageX + hoverOffsetX) + 'px')
.style('top', (event.pageY + hoverOffsetY) + 'px');
});
svg
.selectAll('circle')
.data(outliers)
.join('circle')
.attr('cx', (d) => x(d))
.attr('cy', () => (height / 2 + (Math.random() * (boxWidth / 2) - (boxWidth / 4))) )
.attr('r', radius)
.attr('fill', color)
.attr('opacity', opacity)
.attr('stroke', 'black')
.attr('stroke-width', strokeWidth);
svg
.selectAll('rect')
.data([null])
.join('rect')
.attr('x', x(q1))
.attr('y', height / 2 - boxWidth / 2)
.attr('width', x(q3) - x(q1))
.attr('height', boxWidth)
.attr('fill', color)
.attr('stroke', 'black')
.attr('stroke-width', strokeWidth);
svg
.selectAll('#median')
.data([null])
.join('line')
.attr('id', 'median')
.attr('x1', x(q2))
.attr('y1', height / 2 - boxWidth / 2)
.attr('x2', x(q2))
.attr('y2', height / 2 + boxWidth / 2)
.attr('stroke', 'black')
.attr('stroke-width', strokeWidth * 2);
svg
.selectAll('#lower-whisker')
.data([null])
.join('line')
.attr('id', 'lower-whisker')
.attr('x1', x(min))
.attr('y1', height / 2)
.attr('x2', x(q1))
.attr('y2', height / 2)
.attr('stroke', 'black')
.attr('stroke-width', strokeWidth);
svg
.selectAll('#lower-whisker-edge')
.data([null])
.join('line')
.attr('id', 'lower-whisker-edge')
.attr('x1', x(min))
.attr('y1', height / 2 - boxWidth / 4)
.attr('x2', x(min))
.attr('y2', height / 2 + boxWidth / 4)
.attr('stroke', 'black')
.attr('stroke-width', strokeWidth);
svg
.selectAll('#upper-whisker')
.data([null])
.join('line')
.attr('id', 'upper-whisker')
.attr('x1', x(q3))
.attr('y1', height / 2)
.attr('x2', x(max))
.attr('y2', height / 2)
.attr('stroke', 'black')
.attr('stroke-width', strokeWidth);
svg
.selectAll('#upper-whisker-edge')
.data([null])
.join('line')
.attr('id', 'upper-whisker-edge')
.attr('x1', x(max))
.attr('y1', height / 2 - boxWidth / 4)
.attr('x2', x(max))
.attr('y2', height / 2 + boxWidth / 4)
.attr('stroke', 'black')
.attr('stroke-width', strokeWidth);
if (!removeAxis) {
svg
.selectAll('.x-axis')
.data([null])
.join('g')
.attr('class', 'x-axis')
.attr('transform', `translate(0,${height - margin.bottom})`)
.call(d3.axisBottom(x));
if (xLabel) {
svg
.selectAll('.x-axis-label')
.data([null])
.join('text')
.attr('class', 'x-axis-label')
.attr('text-anchor', 'end')
.attr('x', width)
.attr('y', height - margin.bottom / 3)
.text(xLabel)
.style('font-size', fontSize * (3/4));
}
}
if (title) {
svg
.selectAll('.title')
.data([null])
.join('text')
.attr('class', 'title')
.text(title)
.attr('text-anchor', 'middle')
.attr('x', width / 2)
.attr('y', margin.top / 2);
}
}
boxPlot.width = function (_) {
return arguments.length ? ((width = +_), boxPlot) : width;
}
boxPlot.height = function (_) {
return arguments.length ? ((height = +_), boxPlot) : height;
}
boxPlot.margin = function (_) {
return arguments.length ? ((margin = _), boxPlot) : margin;
}
boxPlot.data = function (_) {
return arguments.length ? ((data = _), boxPlot) : data;
}
boxPlot.xMin = function (_) {
return arguments.length ? ((xMin = +_), boxPlot) : xMin;
}
boxPlot.xMax = function (_) {
return arguments.length ? ((xMax = +_), boxPlot) : xMax;
}
boxPlot.xLabel = function (_) {
return arguments.length ? ((xLabel = _), boxPlot) : xLabel;
}
boxPlot.title = function (_) {
return arguments.length ? ((title = _), boxPlot) : title;
}
boxPlot.boxWidth = function (_) {
return arguments.length ? ((boxWidth = +_), boxPlot) : boxWidth;
}
boxPlot.color = function (_) {
return arguments.length ? ((color = _), boxPlot) : color;
}
boxPlot.strokeWidth = function (_) {
return arguments.length ? ((strokeWidth = +_), boxPlot) : strokeWidth;
}
boxPlot.opacity = function (_) {
return arguments.length ? ((opacity = +_), boxPlot) : opacity;
}
boxPlot.radius = function (_) {
return arguments.length ? ((radius = +_), boxPlot) : radius;
}
boxPlot.fontSize = function (_) {
return arguments.length ? ((fontSize = +_), boxPlot) : fontSize;
}
boxPlot.hoverOffsetX = function (_) {
return arguments.length ? ((hoverOffsetX = +_), boxPlot) : hoverOffsetX;
}
boxPlot.hoverOffsetY = function (_) {
return arguments.length ? ((hoverOffsetY = +_), boxPlot) : hoverOffsetY;
}
boxPlot.removeAxis = function (_) {
return arguments.length ? ((removeAxis = _), boxPlot) : removeAxis;
}
return boxPlot;
}
<style>
.tooltip {
padding: 8px 12px;
color: white;
border-radius: 6px;
border: 2px solid rgba(255,255,255,0.5);
box-shadow: 0 1px 4px 0 rgba(0,0,0,0.2);
pointer-events: none;
transform: translate(-50%, -100%);
font-family: "Helvetica", sans-serif;
font-size: 12px;
background: rgba(20,10,30,0.6);
transition: 0.2s opacity ease-out, 0.1s border-color ease-out;
}
</style>
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