Created
November 29, 2012 03:17
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為替の変動を折れ線グラフとして表示するプログラム
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| <!doctype html> | |
| <html lang="ja"> | |
| <head> | |
| <title>論プロテンプレート</title> | |
| <meta charset="utf-8"> | |
| <link rel="stylesheet" href="stylesheets/bootstrap.min.css"> | |
| <style type="text/css"> | |
| body { | |
| padding-top: 60px; | |
| padding-bottom: 40px; | |
| } | |
| .sidebar-nav { | |
| padding: 9px 0; | |
| } | |
| textarea{ | |
| width: 100%; | |
| height: 10em; | |
| } | |
| </style> | |
| <link rel="stylesheet" href="stylesheets/bootstrap-responsive.min.css"> | |
| <!--[if lt IE 9]> | |
| <script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script> | |
| <![endif]--> | |
| </head> | |
| <body> | |
| <div class="navbar navbar-inverse navbar-fixed-top"> | |
| <div class="navbar-inner"> | |
| <div class="container"> | |
| <a class="brand" href="#">Project Name</a> | |
| </div> | |
| </div> | |
| </div> | |
| <div class="container"> | |
| <h1>論プロテンプレート</h1> | |
| <canvas id="canvas" width="600" height="300"></canvas> | |
| </div> | |
| <script type="text/javascript" src="http://ipl.sfc.keio.ac.jp/text/pro-2011-9/lib/usdjpy.js"></script> | |
| <script type="text/javascript"> | |
| function drawXAxis(ctx){ | |
| ctx.lineWidth = 3.0; | |
| ctx.strokeStyle ="black"; | |
| ctx.beginPath(); | |
| ctx.moveTo(0, 300); | |
| ctx.lineTo(600, 300); | |
| ctx.stroke(); | |
| ctx.closePath(); | |
| } | |
| function drawYAxis(ctx){ | |
| ctx.lineWidth =3.0; | |
| ctx.strokeStyle ="black"; | |
| ctx.beginPath(); | |
| ctx.moveTo(0, 300); | |
| ctx.lineTo(0, 0); | |
| ctx.stroke(); | |
| ctx.closePath(); | |
| } | |
| function drawAxis(ctx){ | |
| drawXAxis(ctx); | |
| drawYAxis(ctx); | |
| } | |
| function drawLineChart(ctx){ | |
| ctx.lineWidth = 3.0; | |
| ctx.strokeStyle = "#800"; | |
| var i = 1; | |
| var dx = 600 / usdjpy.length; | |
| var uy = 300 / 90; | |
| ctx.beginPath(); | |
| ctx.moveTo(0, 300 - usdjpy[0][1] * uy); | |
| while(i < usdjpy.length){ | |
| var record = usdjpy[i]; | |
| var y = 300 - record[1] * uy; | |
| ctx.lineTo(i*dx, y); | |
| i = i + 1; | |
| } | |
| ctx.stroke(); | |
| ctx.closePath(); | |
| } | |
| var canvas = document.getElementById("canvas"); | |
| var ctx = canvas.getContext("2d"); | |
| drawAxis(ctx); | |
| drawLineChart(ctx); | |
| </script> | |
| </body> | |
| </html> |
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