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@vidyakesavan
Last active July 12, 2018 09:36
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Create a basic bar chart in D3
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>D3: Basic Barchart</title>
<script type="text/javascript" src="https://d3js.org/d3.v5.js"></script>
<style type="text/css">
/* No style rules here yet */
</style>
</head>
<body>
<script type="text/javascript">
var w = 600;
var h = 250;
var dataset = [ 5, 10, 13, 19, 21, 25, 22, 18, 15, 13,
11, 12, 15, 20, 18, 17, 16, 18, 23, 25 ];
//create ordinal scale
var xScale = d3.scaleBand()
.domain(d3.range(dataset.length))
.rangeRound([0,w])
.paddingInner(0.05);
var yScale = d3.scaleLinear()
.domain([0, d3.max(dataset)])
.range([0, h]);
//Create SVG element
var svg = d3.select("body")
.append("svg")
.attr("width", w)
.attr("height", h);
//build bars
svg.selectAll("rect")
.data(dataset)
.enter()
.append("rect")
.attr("x", function(d,i){
return xScale(i);
})
.attr("y", function(d){
return h - yScale(d);
})
.attr("width", xScale.bandwidth())
.attr("height", function(d) {
return yScale(d);
})
.attr("fill" ,"teal");
//text labels on bars
svg.selectAll("text")
.data(dataset)
.enter()
.append("text")
.text(function(d) {
return d;
})
.attr("x", function(d,i){
return xScale(i) + xScale.bandwidth() / 2;
})
.attr("y", function(d){
return h - yScale(d) + 14 ;
})
.attr("font-family" , "sans-serif")
.attr("font-size" , "11px")
.attr("fill" , "white")
.attr("text-anchor", "middle");
</script>
</body>
</html>
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