Data visualization and hacktivism from Buenos Aires, Argentina.
(A Graph designer trying to code)
Published
Edited
Jul 18, 2020
chart = {
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height])
.attr("fill", "none")
.attr("stroke-linejoin", "round")
.attr("stroke-linecap", "round");
svg.append("g")
.call(xAxis);
svg.append("g")
.call(yAxis);
svg.append("path")
.datum(data.filter(line.defined()))
.attr("stroke", "#ccc")
.attr("d", line);
svg.append("path")
.datum(data)
.attr("stroke", "steelblue")
.attr("stroke-width", 1.5)
.attr("d", line);
return svg.node();
}
height = 500
margin = ({top: 20, right: 30, bottom: 30, left: 40})
x = d3.scaleUtc()
.domain(d3.extent(data, d => d.date))
.range([margin.left, width - margin.right])
y = d3.scaleLinear()
.domain([0, d3.max(data, d => d.value)]).nice()
.range([height - margin.bottom, margin.top])
xAxis = g => g
.attr("transform", `translate(0,${height - margin.bottom})`)
.call(d3.axisBottom(x).ticks(width / 80).tickSizeOuter(0))
yAxis = g => g
.attr("transform", `translate(${margin.left},0)`)
.call(d3.axisLeft(y))
.call(g => g.select(".domain").remove())
.call(g => g.select(".tick:last-of-type text").clone()
.attr("x", 3)
.attr("text-anchor", "start")
.attr("font-weight", "bold")
.text(data.y))
line = d3.line()
.defined(d => d.date!="")
.x(d => x(d.date))
.y(d => y(d.value))
data = Object.assign(d3.tsvParse(source, d3.autoType).map(({date, close}) => ({date, value: close})))
d3 = require("d3@5")
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
