November 2018
Intermediate to advanced
272 pages
6h 51m
Japanese
book
エレガントなSciPy ―Pythonによる科学技術計算
by Juan Nunez-Iglesias, Stéfan van der Walt, Harriet Dashnow, 山崎 邦子, 山崎 康宏
Content preview from エレガントなSciPy ―Pythonによる科学技術計算
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196
8 章 Toolz を使って小さなノートパソコンでビッグデータを処理する方法
taking log of array 4
adding line 4 to the running mean
finished readtsv
finished adding 1
finished log
returning mean
元々は複数行にわたったり、手に負えないほど括弧が多用されていたものが、入力データが逐次
変換される様子がすっきりと記述されるようになりました。この方がずっとわかりやすいですね。
この方法は、
NumPy
を使った元の実装に比べて有利です。なぜなら、入力データを数百万行や
数十億行まで拡張すると、我々のコンピュータでは全部のデータをメモリに保持するのが難しく
なるかもしれませんが、上の方法では、ディスクからデータを
1
行ずつ読み込むだけで、
1
行分の
データしか維持していないからです。
8.3
k-mer
のカウントとエラー補正
ここで、
DNA
とゲノム科学について振り返るために、「
1
章 エレガントな
NumPy
：科学
Python
の基礎」と「
2
章
NumPy
と
SciPy
を用いた分位数正規化」を読み返すとよいかもしれま
せん。かいつまんで言うと、あなたの遺伝情報、つまりあなたの設計図は、あなたのゲノムの化学
的な塩基配列によって記述されています。塩基配列は非常に小さいので、顕微鏡で見て読み取るわ
けにはいきません。また、長い塩基配列データを読むこともできません。なぜなら、エラーが集積
して、読み出された情報が使用不能になるからです ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.