Why can't a cylinder type chart be created?
It is very simple to do with Excel.
It can't be done with chartjs and d3js.
It is not suitable with Three.
Sample :
<!DOCTYPE html>
<html>
<head>
<title>Sample Gr</title>
<script src="https://d3js.org/d3.v7.min.js";></script>
</head>
<body>
<div id="chart"></div>
<script>
var data = [
{ category: 'Cat A', value1: 20, value2: 80 },
{ category: 'Cat B', value1: 40, value2: 60 },
{ category: 'Cat C', value1: 70, value2: 30 },
];
data.forEach(function(d) {
var total = d.value1 + d.value2;
d.value1 = (d.value1 / total) * 100;
d.value2 = (d.value2 / total) * 100;
});
var margin = { top: 20, right: 30, bottom: 50, left: 60 },
width = 400 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;
var svg = d3.select('#chart')
.append('svg')
.attr('width', width + margin.left + margin.right)
.attr('height', height + margin.top + margin.bottom)
.append('g')
.attr('transform', 'translate(' + margin.left + ',' + margin.top
+ ')');
var x = d3.scaleBand()
.domain(data.map(function(d) { return d.category; }))
.range([0, width])
.padding(0.1);
var y = d3.scaleLinear()
.domain([0, 100])
.nice()
.range([height, 0]);
var color = d3.scaleOrdinal()
.domain(['value1', 'value2'])
.range(['#3399FF', '#D1DAE3']);
var stackedData = d3.stack()
.keys(['value1', 'value2'])
.order(d3.stackOrderNone)
.offset(d3.stackOffsetNone)(data);
svg.selectAll()
.data(stackedData)
.join('g')
.attr('fill', function(d) { return color(d.key); })
.selectAll('rect')
.data(function(d) { return d; })
.join('rect')
.attr('x', function(d) { return x(d.data.category); })
.attr('y', function(d) { return y(d[1]); })
.attr('width', x.bandwidth())
.attr('height', function(d) { return y(d[0]) - y(d[1]); })
.attr('stroke', 'black')
.attr('stroke-width', 3);
svg.append('g')
.attr('class', 'axis')
.attr('transform', 'translate(0,' + height + ')')
.call(d3.axisBottom(x));
svg.append('g')
.attr('class', 'axis')
.call(d3.axisLeft(y).ticks(10).tickFormat(d3.format('.0f')));
svg.selectAll('.bar-label')
.data(data)
.join('text')
.attr('class', 'bar-label')
.attr('x', function(d) { return x(d.category) + x.bandwidth() /
2; })
.attr('y', function(d) { return y(d.value1 + d.value2) + 15; })
.attr('text-anchor', 'middle')
.text(function(d) { return d.value1.toFixed(1) + '%, '; });
svg.append('text')
.attr('x', width / 2)
.attr('y', height + margin.top + 30)
.attr('text-anchor', 'middle')
.style('font-size', '16px')
.text('Sample');
</script>
</body>
</html>
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