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d3 line chart sever side with node
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var fs = require('fs'); | |
var d3 = require('d3'); | |
var jsdom = require('jsdom'); | |
module.exports = function(outputLocation, graphTitle) { | |
if (!outputLocation) | |
outputLocation = 'test.svg'; | |
if (!graphTitle) | |
graphTitle = "Value vs Date Graph"; | |
jsdom | |
.env({ | |
html : '', | |
features : { | |
QuerySelector : true | |
}, // you need query selector for D3 to work | |
done : function(errors, window) { | |
window.d3 = d3.select(window.document); | |
// set the dimensions and margins of the graph | |
var margin = { | |
top : 40, | |
right : 20, | |
bottom : 40, | |
left : 70 | |
}, width = 960 - margin.left - margin.right, height = 520 | |
- margin.top - margin.bottom; | |
var cssText = ".line { fill: none; stroke: steelblue; stroke-width: 2px; }"; | |
// 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 line | |
var valueline = d3.line().x(function(d) { | |
return x(d.date); | |
}).y(function(d) { | |
return y(d.close); | |
}); | |
var svg = window.d3.select('body').append('div').attr( | |
'class', 'container').append("svg").attr("width", | |
width + margin.left + margin.right).attr("height", | |
height + margin.top + margin.bottom).attr("xmlns", | |
"http://www.w3.org/2000/svg").append("g") | |
.attr( | |
"transform", | |
"translate(" + margin.left + "," | |
+ margin.top + ")"); | |
svg.append("style").attr("type", "text/css").text(cssText); | |
// Get the data | |
var rawdata = fs.readFileSync('data.csv', 'utf8'); | |
var data = d3.csvParse(rawdata); | |
var xlabel = data.columns[0]; | |
var ylabel = data.columns[1]; | |
data.forEach(function(d) { | |
d.date = parseTime(d.Date); | |
d.close = +d.Value; | |
}); | |
x.domain(d3.extent(data, function(d) { | |
return d.date; | |
})); | |
y.domain([ 0, d3.max(data, function(d) { | |
return d.close; | |
}) ]); | |
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)); | |
// text label for the x axis | |
svg.append("text").attr("x", 480).attr("y", 475).style( | |
"text-anchor", "middle").text(xlabel); | |
// Add the Y Axis | |
svg.append("g").call(d3.axisLeft(y)); | |
svg.append("text").attr("transform", "rotate(-90)").attr( | |
"y", 0 - margin.left).attr("x", 0 - (height / 2)) | |
.attr("dy", "1em").style("text-anchor", "middle") | |
.text(ylabel); | |
// add a title | |
svg.append("text").attr("x", (width / 2)).attr("y", | |
0 - (margin.top / 2)).attr("text-anchor", "middle") | |
.style("font-size", "20px").style( | |
"text-decoration", "underline").text( | |
graphTitle); | |
fs.writeFileSync(outputLocation, window.d3.select( | |
'.container').html()); | |
} | |
}); | |
} | |
if (require.main === module) { | |
module.exports(); | |
} |
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