histogram = (g) => {
// HISTOGRAM
// set the parameters for the histogram
const hist = d3
.histogram()
.value((d) => d[0]) // get value from the datum
.domain(x.domain()) // then the domain of the graphic
.thresholds(x.ticks(80)); // then the numbers of bins
// And apply this function to data to get the bins
let bins = hist(data);
const yHeight = y.range()[0] - y.range()[1];
// Y axis: scale and draw:
const yHist = d3
.scaleLinear()
.range([yHeight, 0])
.domain([0, d3.max(bins, (d) => d.length)]);
// append the bar rectangles to the svg element
return g
.selectAll(".histRect")
.data(bins)
.join("rect")
.attr("class", "histRect")
.attr("x", 1)
.attr("transform", function (d) {
return (
"translate(" + x(d.x0) + "," + (yHist(d.length) + margin.top) + ")"
);
})
.attr("width", function (d) {
return x(d.x1) - x(d.x0);
})
.attr("height", function (d) {
return yHeight - yHist(d.length);
})
.style("fill", color)
.style("stroke", "white");
}
title = (g) =>
g
.append("text")
.attr("text-anchor", "start")
.attr("font-family", "sans-serif")
.attr("font-size", "xlarge")
.attr("x", margin.left)
.attr("y", margin.top)
.attr("dx", ".5em")
.attr("dy", ".5em")
.text(titleText)
titleText = "Title"
xAxis = (g) =>
g
.attr("transform", `translate(0,${height - margin.bottom})`)
.call(d3.axisBottom(x).ticks(6))
.attr("font-size", "medium")
yAxis = g => g
.attr("transform", `translate(${margin.left}, 0)`)
.call(d3.axisLeft(y).ticks(3))
x = d3.scaleTime(d3.extent(data, d => d[0]), [margin.left, width - margin.right])
y = d3.scaleLinear(d3.extent(data, d => d[1]), [height - margin.bottom, margin.top])
height - margin.bottom - margin.top
margin = ({top: 10, right: 20, bottom: 20, left: 20})
height = 120
color = "#69b3a2"
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