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Last active May 3, 2016 05:08
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React and D3
Raw
README.md

Letter Frequency Bar Chart example rendered with React. This is my first pass at D3 + React. The svg, scales, and axes are defined in componentDidMount. The data is loaded there as well. The chart is drawn in render.

Raw
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<style>
.bar {
fill: steelblue;
}
.bar:hover {
fill: brown;
}
.axis text {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
display: none;
}
</style>
<script src="https://fb.me/react-0.14.0.js"></script>
<script src="https://fb.me/react-dom-0.14.0.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.8.23/browser.min.js"></script>
<script src="http://d3js.org/d3.v3.js"></script>
</head>
<body>
<div id="graph_container"></div>
<script type="text/babel">
var LetterFrequencyChart = React.createClass({
getInitialState: function() {
return {
data: [],
svg: "",
scales: {},
axes: {},
display: { width: 960, height: 500, margin: {top: 20, right: 30, bottom: 30, left: 40 }}
};
},
componentDidMount: function() {
var state = this.state,
margin = state.display.margin,
width = state.display.width - margin.left - margin.right,
height = state.display.height - margin.top - margin.bottom;
var xScale = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
var yScale = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(xScale)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(yScale)
.orient("left")
.ticks(10, "%");
var that = this;
d3.tsv("/d/ffb26726c512f3a35643/data.tsv", function(error, data) {
data = data.map(function(d) { return { letter: d.letter, value: +d.frequency }; });
xScale.domain(data.map(function(d) { return d.letter; }));
yScale.domain([0, d3.max(data, function(d){ return d.value; })]);
that.setState({
data: data,
svg: d3.select("#graph").append("svg")
.attr("height", height + margin.top + margin.bottom)
.attr("width", width + margin.left + margin.right)
.attr("class", "chart"),
scales: { xScale: xScale, yScale: yScale },
axes: { xAxis: xAxis, yAxis: yAxis }
});
});
},
render: function() {
var state = this.state,
data = state.data,
svg = state.svg || false,
margin = state.display.margin,
width = state.display.width - margin.left - margin.right,
height = state.display.height - margin.top - margin.bottom,
xScale = state.scales.xScale,
yScale = state.scales.yScale,
xAxis = state.axes.xAxis,
yAxis = state.axes.yAxis;
if (svg) {
var chart = svg.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
chart.selectAll(".bar")
.data(data)
.enter()
.append("rect")
.attr("class", "bar")
.attr("x", function(d) { return xScale(d.letter); })
.attr("y", function(d) { return yScale(d.value); })
.attr("height", function(d) { return height - yScale(d.value); })
.attr("width", xScale.rangeBand());
chart.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
chart.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Frequency");
}
return (
<div id="graph"></div>
);
}
});
ReactDOM.render(
<LetterFrequencyChart />,
document.getElementById("graph_container")
);
</script>
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