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@vincentpham1991
Last active April 13, 2016 03:54
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National Day of Civic Hacking: Learning D3.js (part 1)
month tot_adoption
2013-10 359
2013-11 342
2013-12 427
2014-01 313
2014-02 261
2014-03 285
2014-04 270
2014-05 301
2014-06 378
2014-07 579
2014-08 497
2014-09 369
2014-10 382
2014-11 320
2014-12 403
2015-01 340
2015-02 287
2015-03 286
2015-04 230
2015-05 385
2015-06 452
2015-07 572
2015-08 458
2015-09 411
2015-10 360
2015-11 419
2015-12 420
2016-01 392
2016-02 271
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.12/d3.min.js"></script>
<style>
body {
font-family: futura;
}
h2.title {
color: black;
text-align: center;
}
.axis {
font-family: arial;
font-size: 0.7em;
}
text {
fill: black;
stroke: none;
}
.label {
font-size: 2em;
}
path {
fill: none;
stroke: black;
stroke-width: 2px;
}
.tick {
fill: none;
stroke: black;
}
.bar {
opacity: 0.5;
stroke: none;
fill: teal;
}
</style>
<script type="text/javascript">
// https://github.com/mbostock/d3/wiki/Time-Formatting
format = d3.time.format("%Y-%m");
function draw(data) {
"use strict";
debugger;
// set margins according to Mike Bostock's margin conventions
// http://bl.ocks.org/mbostock/3019563
var margin = {top: 25, right: 40, bottom: 100, left: 75};
// set height and width of chart
var width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var barPadding = 10;
// column we want to plot
var field = 'tot_adoption';
// Append the title for the graph
d3.select("body")
.append("h2")
.text("Total Animal Adopted")
.attr('class', 'title');
// append the SVG tag with height and width to accommodate for margins
var svg = d3.select("body")
.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append('g')
.attr('class','chart')
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
// remove missing values
data = data.filter(function(d) {
return d[field];
});
// bind our data to svg rects for the bar plot
svg.selectAll(".bar")
.data(data)
.enter()
.append("rect")
.attr('class', 'bar')
// maximum pets adopted
var max_y = d3.max(data, function(d) {
return +d[field];
});
// get min/max dates
var time_extent = d3.extent(data, function(d){
return format.parse(d['month']);
});
// Create x-axis scale mapping dates -> pixels
var time_scale = d3.time.scale()
.range([0, width])
.domain(time_extent);
// Create y-axis scale mapping price -> pixels
var measure_scale = d3.scale.linear()
.range([height, 0])
.domain([0, max_y]);
// Create D3 axis object from time_scale for the x-axis
var time_axis = d3.svg.axis()
.scale(time_scale)
.tickFormat(d3.time.format("%b %y"));
// Create D3 axis object from measure_scale for the y-axis
var measure_axis = d3.svg.axis()
.scale(measure_scale)
.orient("left");
// Append SVG to page corresponding to the D3 x-axis
svg.append('g')
.attr('class', 'x axis')
.attr('transform', "translate(0," + height + ")")
.call(time_axis);
// Append SVG to page corresponding to the D3 y-axis
svg.append('g')
.attr('class', 'y axis')
.call(measure_axis);
// add label to y-axis
var y_label = d3.select(".y.axis")
.append("text")
.attr('class', 'label')
.text("Total")
.style('font-size', '1.2em')
.attr("transform", "rotate(-90)");
// center y axis label
y_label.attr("x", -(height / 2)).attr('y', -40)
.style("text-anchor", "middle");
// based on the data bound to each svg rect,
// change its x, y, width, height accordingly
d3.selectAll('.bar')
.attr('x', function(d) {
return time_scale(format.parse(d['month']));
})
.attr('width', function(d) {
return width / data.length - barPadding;
})
.attr('y', function(d) {
return measure_scale(+d[field]);
})
.attr('height', function(d) {
return height - measure_scale(+d[field]);
});
};
</script>
</head>
<body>
<script type="text/javascript">
// load our data file asynchronously and pass the data
// to the draw function once it is loaded.
d3.csv("data.csv", draw);
</script>
</body>
</html>
@BinjieLai
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Love the bar color!

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