Created
October 3, 2017 16:04
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Test Visualization
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// set the dimensions and margins of the graph | |
var margin = {top: 20, right: 20, bottom: 30, left: 50}, | |
width = 960 - margin.left - margin.right, | |
height = 500 - margin.top - margin.bottom; | |
// parse the date / time | |
var parseTime = d3.timeParse("%d-%b-%y"); | |
// set the ranges | |
var x = d3.scaleTime().range([0, width]); | |
var y = d3.scaleLinear().range([height, 0]); | |
// define the area | |
var area = d3.area() | |
.x(function(d) { return x(d.date); }) | |
.y0(height) | |
.y1(function(d) { return y(d.close); }); | |
// define the line | |
var valueline = d3.line() | |
.x(function(d) { return x(d.date); }) | |
.y(function(d) { return y(d.close); }); | |
// append the svg obgect to the body of the page | |
// appends a 'group' element to 'svg' | |
// moves the 'group' element to the top left margin | |
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 + ")"); | |
// get the data | |
d3.csv("https://raw.githubusercontent.com/eledroos/TestingVisualization/master/policedata.csv", function(error, data) { | |
if (error) throw error; | |
// format the data | |
data.forEach(function(d) { | |
d.date = parseTime(d.date); | |
d.close = +d.close; | |
}); | |
// scale the range of the data | |
x.domain(d3.extent(data, function(d) { return d.date; })); | |
y.domain([0, d3.max(data, function(d) { return d.close; })]); | |
// add the area | |
svg.append("path") | |
.data([data]) | |
.attr("class", "area") | |
.attr("d", area); | |
// add the valueline path. | |
svg.append("path") | |
.data([data]) | |
.attr("class", "line") | |
.attr("d", valueline); | |
// 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)); | |
}); |
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