August 2015
Intermediate to advanced
272 pages
5h 46m
Japanese
Content preview from Think Stats 第2版 ―プログラマのための統計入門
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5
5
1.4 DataFrame
テキストファイル（
ASCII
）を
gzip
圧縮したファイルです。ファイルの各行が
1
つ
のレコード（
record
）で、
1
つの妊娠についてのデータを表します。
ファイルフォーマットは、
Stata
辞書ファイル形式の
2002FemPreg.dct
に文書化さ
れています。
Stata
は商品として販売されている統計ソフトのシステムです。この文
脈での「辞書（
dictionary
）」とは、変数名、型、インデックスのリストです。インデッ
クスは、行のどこに変数（の値）があるかを示します。
例えば、
2002FemPreg.dct
には次のような行があります。
infile dictionary {
_column(1) str12 caseid %12s "RESPONDENT ID NUMBER"
_column(13) byte pregordr %2f "PREGNANCY ORDER (NUMBER)"
}
この辞書は次の
2
変数を記述しています。
caseid
は、回答者
ID
を表す
12
文字の
文字列です。
pregordr
は、この回答者の何回目の妊娠かを示す
1
バイト整数です。
ダウンロードしたコードには、
thinkstats2.py
モジュールが含まれています。こ
の
Python
モジュールには、本書で使う多数のクラスや関数に加えて、
Stata
辞書や
NSFG
データファイルを読む関数も含まれています。
nsfg.py
でこのモジュールがど
う使われているかを次に示します。
def ReadFemPreg(dct_file='2002FemPreg.dct', ...
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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.