Google Chart APIを使ってTeX数式の画像を取得
5月 10th, 2012 | 
Author: 下記のようなタグをHTMLに埋め込みます。
<img src="http://chart.apis.google.com/chart?cht=tx&chl=F(\omega)=\int_{-\infty}^{\infty} f(t)e^{-j\omega t} {\mathrm d}t" alt="Fourier transform" />
すると、
となって出来上がり！フーリエ変換ですね！
たとえばこんな格好良い数式も、
<img src="http://chart.apis.google.com/chart?cht=tx&chl=\frac{1}{\pi}=\frac{2\sqrt{2}}{99^{2}}\sum_{n=0}^{\infty}\frac{(4n)!(1103%2B26390n)}{(4^{n}99^{n}n!)^4}" alt="Ramanujan's pi" />
こうやって出来上がり！
ラマヌジャンの円周率の公式ですね。’+’の記号は’%2B’にURLエンコードしてあげないといけないみたいです。
※2012/5/11補足
Google Chart APIの公式ページによると、数式関係のAPI（Infographics）は2012/4/20現在Deprecated（非推奨）とのこと。。。近日なくなるやもしれません。便利なのになあ。。。
Google Chart API Infographics https://developers.google.com/chart/infographics/
Posted in IT
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