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Bar-Graph

Graph1

<style>

.bar { fill: steelblue; }

.bar:hover { fill: brown; }

.axis { font: 10px sans-serif; }

.axis path, .axis line { fill: none; stroke: #000; shape-rendering: crispEdges; }

.x.axis path { display: none; }

</style> <script src="http://d3js.org/d3.v3.min.js"></script> <script>

var margin = {top: 20, right: 20, bottom: 30, left: 40}, width = 960 - margin.left - margin.right, height = 500 - margin.top - margin.bottom;

var x = d3.scale.ordinal() .rangeRoundBands([0, width], .1);

var y = d3.scale.linear() .range([height, 0]);

var xAxis = d3.svg.axis() .scale(x) .orient("bottom");

var yAxis = d3.svg.axis() .scale(y) .orient("left") .ticks(10, "%");

var svg = d3.select("body").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 + ")");

d3.tsv("data.tsv", type, function(error, data) { x.domain(data.map(function(d) { return d.letter; })); y.domain([0, d3.max(data, function(d) { return d.frequency; })]);

svg.append("g") .attr("class", "x axis") .attr("transform", "translate(0," + height + ")") .call(xAxis);

svg.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");

svg.selectAll(".bar") .data(data) .enter().append("rect") .attr("class", "bar") .attr("x", function(d) { return x(d.letter); }) .attr("width", x.rangeBand()) .attr("y", function(d) { return y(d.frequency); }) .attr("height", function(d) { return height - y(d.frequency); });

});

function type(d) { d.frequency = +d.frequency; return d; }

</script> data.tsv#

Major frequency Computer Science.4 Social Science.4 Biology.2 Chemistry.2 Physics.3 Medieval History.1 Psychology.2 Art.3 English.1 Economics.2