dataviz & research
Public
Edited
Jan 23, 2023
data_normal = Array.from({length: 20000}, d3.randomNormal(1, 1))
bin = d3.bin().thresholds(50)
data = bin(data_normal)
histogram(data)
histogram = (data, w=400, h=200, g) => {
const svg =
g ||
d3
.create("svg")
.attr("viewBox", [0, 0, w, h])
.attr("width", w)
.attr("height", h);
let margin = { top: 10, right: 10, bottom: 10, left: 50 };
let width = w - margin.left - margin.right,
height = h - margin.top - margin.bottom;
const x = d3.scaleLinear()
.domain([data[0].x0, data[data.length - 1].x1])
.range([margin.left, width]);
const y = d3.scaleLinear()
.domain([0, d3.max(data.map(d => d.length))])
.range([height + margin.top, margin.top]);
svg.selectAll('rect.hist').data(data).enter().append('rect')
.attr('class', 'hist')
.attr('x', d => x(d.x0))
.attr('y', d => y(d.length))
.attr('height', d => height - y(d.length))
.attr('width', d => x(d.x1) - x(d.x0))
let xAxis = d3.axisBottom()
.scale(x);
let yAxis = d3.axisLeft().scale(y)
svg.append("g")
.attr("transform", `translate(${margin.left},0)`)
.call(yAxis);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
return svg.node();
}
bar_chart()
bar_chart = (w=200, h=100, g, dataset) => {
const svg =
g ||
d3
.create("svg")
.attr("viewBox", [0, 0, w, h])
.attr("width", w)
.attr("height", h);
let margin = { top: 10, right: 10, bottom: 10, left: 10 };
let width = w - margin.left - margin.right,
height = h - margin.top - margin.bottom;
let data = dataset ||
[22, 32, 21, 23, 10, 22, 11, 19, 30, 50, 19, 30, 50, 19];
let y = d3
.scaleLinear()
.domain([0, d3.max(data)])
.range([0, height]);
let x = d3
.scaleBand()
.padding(0.1)
.domain(data)
.range([0, width]);
var s = svg
.selectAll("rect")
.data(data)
.enter()
.append("rect");
svg
.selectAll("rect").data(data)
.attr("fill", "white")
.attr("stroke", "black")
.attr("stroke-width", 1)
.attr("width", () => x.bandwidth())
.attr("height", (d, i) => y(d))
.attr("x", function(d, i) {
return x(d);
})
.attr("y", function(d) {
return height - y(d);
});
return svg.node();
}
data_normal_cumsum = d3.cumsum(data_normal)
Plot.line(data_normal_cumsum, {x: (d, i) => i, y: (d, i) => d}).plot()
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.