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index-e3.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Ejemplo #3</title>
<link rel="stylesheet" href="node_modules/bootstrap/dist/css/bootstrap.min.css">
<style>
.chart svg {
border: 1px solid black;
padding: 0px;
}
.bar {
stroke: white;
}
</style>
</head>
<body>
<main class="container">
<div class="row">
<div class="col-xs-12">
<h1>Ejemplo #3</h1>
<p>Data joins, animación</p>
</div>
<section class="col-xs-12">
<h2>Evolución Temporal</h2>
<button id="step-forward">Avanza</button>
<div class="chart"></div>
</section>
</div>
</main>
<script src="node_modules/jquery/dist/jquery.min.js"></script>
<script src="node_modules/lodash/lodash.min.js"></script>
<script src="node_modules/d3/build/d3.js"></script>
<script>
$(function()
{
"use strict";
var psv = d3.dsvFormat('|','text/plain');
d3.text('./datasets/weather.psv', function(data)
{
var weather = psv.parse(data, function(r)
{
r.day = new Date(r.day);
r.temp_min = +r.temp_min;
r.temp_max = +r.temp_max;
r.humidity = +r.humidity;
r.moon_phase = +r.moon_phase;
return r;
});
console.table(weather.slice(0,10));
var firstDay = 0;
var daysToShow = 30;
var container = {
width: 960,
height: 500,
};
var duration = 500;
function tempMax(d) { return d.temp_max; }
function tempMin(d) { return d.temp_min; }
function day(d) { return d.day; }
var margin = {top: 20, right: 10, bottom: 20, left: 10};
var width = container.width - margin.left - margin.right,
height = container.height - margin.top - margin.bottom;
var svg = d3.select(".chart").append("svg")
.attr("width", container.width)
.attr("height", container.height)
.append("g")
.attr("transform", "translate(" + margin.left + "," + (margin.top + height) + ") scale(1,-1)");
// scales
var x = d3.scaleBand()
.domain(d3.range(daysToShow))
.range([0, width])
.padding(0);
var y = d3.scaleLinear()
.domain([0, d3.max(weather, tempMax)])
.range([0, height]);
// var color = d3.scaleSequential(d3.interpolateRdBu)
var color = d3.scaleSequential(d3.interpolateWarm)
.domain([0, d3.max(weather, tempMax)]);
function updateChart(firstDay)
{
var visibleWeather = weather.slice(firstDay, firstDay + daysToShow);
var bars = svg.selectAll('rect.bar').data(visibleWeather, day);
console.log(bars.enter().size(), bars.size(), bars.exit().size());
bars.enter()
.append('rect')
.attr('class','bar')
.attr('x', function(d,i) { return x(i) + x.bandwidth(); })
.attr('width', x.bandwidth())
.attr('y', function(d) { return y(tempMin(d)); })
.attr('height', function(d) { return y(tempMax(d)-tempMin(d)); })
.style('fill', function(d) { return color(tempMin(d));})
.style('opacity', 0)
.transition()
.duration(duration)
.attr('x', function(d,i) { return x(i); })
.style('opacity', 1)
bars
.transition()
.duration(duration)
.attr('x', function(d,i) { return x(i); })
.attr('width', x.bandwidth())
.attr('y', function(d) { return y(tempMin(d)); })
.attr('height', function(d) { return y(tempMax(d)-tempMin(d)); })
.style('fill', function(d) { return color(tempMin(d));});
bars.exit()
.transition()
.duration(duration)
.attr('x', function() { return x(0) - x.bandwidth(); })
.style('opacity', 0)
.remove()
}
$('#step-forward').on('click', function()
{
firstDay += 1;
updateChart(firstDay);
});
updateChart(0);
setInterval(function()
{
console.log(firstDay);
firstDay += 1;
updateChart(firstDay);
}, duration);
});
});
</script>
</body>
</html>