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@dmcglone
Created Mar 2, 2017
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3. Drawing shapes
license: gpl-3.0
height: 240
border: no
page lion dog tiger
1 1 0 0
2 2 2 0
3 3 3 0
4 3 4 0
5 3 4 0
6 3 4 0
7 3 4 5
8 3 4 5
9 3 4 5
10 3 4 7
11 7 7 7
12 7 7 7
13 8 8 9
14 8 8 9
15 9 9 9
16 10 10 10
17 10 10 10
<!DOCTYPE html>
<meta charset="utf-8">
<head>
<title>Transforming data</title>
</head>
<style>
body {
font-family: "Helvetica Neue", Helvetica, sans-serif;
font-size: 14px;
}
path {
fill: none;
stroke: #aaa;
}
.line {
stroke-width:2px;
}
.line.lion{
stroke:red;
}
.line.dog{
stroke:gold;
}
.line.tiger{
stroke:orange;
}
</style>
<body>
<svg width="800" height="100">
<path/>
</svg>
<script src="http://d3js.org/d3.v4.min.js"></script>
<script>
//1 DRAW A BASIC LINE
var data = [[0, 50], [100, 80], [200, 40], [300, 60], [400, 30]];
var lineGenerator = d3.line()
//.curve(d3.curveNatural);
var pathString = lineGenerator(data);
d3.select('path')
.attr('d', pathString);
//2 MAKE A LINE CHART WITH OUR OWN DATA
d3.csv("data.csv", function(error, data) {
if (error) throw error;
//format the data
data.forEach(function(d) {
d.page = +d.page;
d.lion = +d.lion;
d.dog = +d.dog;
d.tiger = +d.tiger;
});
//lineChart(data,'lion');
//lineChart(data,'dog');
//lineChart(data,'tiger');
});
var lineChart = function(data, character){
// set the dimensions and margins of the graph
var margin = {top: 20, right: 20, bottom: 60, left: 50},
width = 200 - margin.left - margin.right,
height = 200 - margin.top - margin.bottom;
// set the ranges- the space where we will draw
var x = d3.scaleLinear().range([0, width]);
var y = d3.scaleLinear().range([height, 0]);
// define the line
var line = d3.line()
//.curve(d3.curveNatural)
.x(function(d) { return x(d.page); })
.y(function(d) { return y(d[character]); });
//add a new svg to hold the chart
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 + ")");
// Scale the domain of the data
x.domain(d3.extent(data, function(d) { return d.page; }));
y.domain([0, d3.max(data, function(d) { return d[character]; })]);
// Add the line path
svg.append("path")
.data([data])
.attr("class", character+" line")
.attr("d", line);
// Add the X Axis
// svg.append("g")
// .attr("transform", "translate(0," + height + ")")
// .call(d3.axisBottom(x));
// Add the Y Axis
// svg.append("g")
// .call(d3.axisLeft(y));
// And add a label
// svg.append("text")
// .attr("transform", "translate(" + (width/2) + " ," + (height + margin.top + 15) + ")")
// .style("text-anchor", "middle")
// .text(character);
};
</script>
</body>
</html>
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