Created
April 18, 2012 03:12
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var Canvas = require('canvas'), | |
fs = require('fs'); | |
var c = new Canvas(1000, 400); | |
var ctx = c.getContext('2d'); | |
var w = 1000; | |
ctx.fillStyle = '#fff'; | |
ctx.fillRect(0, 0, 1000, 400); | |
ctx.fillStyle = '#000'; | |
var f = fs.readFileSync('keystrokes.log', 'utf8'); | |
var lines = f.split('\n').slice(1); | |
var minutely = {}; | |
for (var i = 0; i < lines.length; i++) { | |
var pts = lines[i].split(','); | |
var d = new Date(pts[0] * 1000); | |
var n = (d.getDay() * 24 * 60) + (d.getHours() * 60) + d.getMinutes(); | |
if (!minutely[n]) minutely[n] = []; | |
minutely[n].push(+pts[1]); | |
} | |
var minutes = []; | |
for (var x in minutely) { | |
minutes.push([+x, minutely[x]]); | |
} | |
minutes = minutes.sort(function(a, b) { return a[0] - b[0] }); | |
var days = 'Sunday Monday Tuesday Wednesday Thursday Friday Saturday'.split(' '); | |
for (var i = 0; i < 7; i++) { | |
ctx.fillText(days[i], 10 + (i / 7) * w, 370); | |
} | |
ctx.fillText('keystroke activity over the course of four months', 10, 385); | |
minutes.map(function(m) { | |
m[1].map(function(j) { | |
ctx.fillRect(~~((m[0] / 10080) * w), ~~(350 - j / 3), 1, 1); | |
}); | |
}); | |
fs.writeFileSync('weekgram.png', c.toBuffer()); |
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