Skip to content

Instantly share code, notes, and snippets.

@d3byex
Created November 19, 2015 21:28
Show Gist options
  • Save d3byex/bd5e13822cb037797ce2 to your computer and use it in GitHub Desktop.
Save d3byex/bd5e13822cb037797ce2 to your computer and use it in GitHub Desktop.
D3byEX 4.10: Bar Graph with Margin and Axis
<!DOCTYPE html>
<html>
<head>
<script src="http://d3js.org/d3.v3.min.js"></script>
<meta name="description" content="D3byEX 4.10" />
<meta charset="utf-8">
</head>
<body>
<script>
var data = [55, 44, 30, 23, 17, 14, 16, 25, 41, 61, 85,
101, 95, 105, 114, 150, 180, 210, 125, 100, 71,
75, 72, 67];
var barWidth = 20, barPadding = 3;
var maxValue = d3.max(data);
var graphWidth = data.length * (barWidth + barPadding) - barPadding;
var margin = { top: 10, right: 10, bottom: 10, left: 50 };
var totalWidth = graphWidth + margin.left + margin.right;
var totalHeight = maxValue + margin.top + margin.bottom;
var svg = d3.select('body')
.append('svg')
.attr({ width: totalWidth, height: totalHeight });
svg.append('rect').attr({
width: totalWidth, height: totalHeight,
fill: 'white',
stroke: 'black', 'stroke-width': 1
});
var mainGroup = svg
.append('g')
.attr('transform', 'translate(' + margin.left + ',' + margin.top + ")");
mainGroup.append('rect').attr({
fill: 'rgba(0,0,0,0.1)', width: totalWidth - (margin.left + margin.right),
height: totalHeight - (margin.bottom + margin.top)
});
function xloc(d, i) { return i * (barWidth + barPadding); }
function yloc(d) { return maxValue - d; }
function translator(d, i) {
return "translate(" + xloc(d, i) + "," + yloc(d) + ")";
}
var barGroup = mainGroup.selectAll('g')
.data(data)
.enter()
.append('g')
.attr('transform', translator);
barGroup.append('rect')
.attr({
fill: 'steelblue',
width: barWidth,
height: function (d) { return d; }
});
var textTranslator = "translate(" + barWidth / 2 + ",0)";
barGroup.append('text')
.text(function(d) { return d; })
.attr({
fill: 'white',
'alignment-baseline': 'before-edge',
'text-anchor': 'middle',
transform: textTranslator
})
.style('font', '10px sans-serif');
var leftAxisGroup = svg.append('g');
var axisPadding = 3;
leftAxisGroup.attr({ transform: 'translate(' + (margin.left - axisPadding) + ',' + margin.top + ')' });
var scale = d3.scale
.linear()
.domain([maxValue, 0])
.range([0, maxValue]);
var axis = d3.svg.axis()
.orient('left')
.scale(scale);
var axisNodes = leftAxisGroup.call(axis);
var domain = axisNodes.selectAll('.domain');
domain.attr({
fill: 'none',
'stroke-width': 1,
stroke: 'black'
});
var ticks = axisNodes.selectAll('.tick line');
ticks.attr({
fill: 'none',
'stroke-width': 1,
stroke: 'black'
});
</script>
</body>
</html>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment