April 2014
Beginner to intermediate
830 pages
15h 21m
Chinese
Content preview from Mathematica 錦囊妙計
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第十四章
554
麻煩的 是 各個債券 可供查詢 的內容不 太一樣， 當查詢資 料恰好不 存在時， 可能會得
到 兩 種 結 果， 一 種 是
Missing["NotAvailable"]
， 另 一 種 則 是 未 執 行 的 表 示 式（ 如
FinancialData["IBM", "CumulativeFractionalChange"]
）。如果想知道哪些內容是存在
的，或想得到關聯性資料的樣本，可執行下列程式碼（以下使用了
Short
指令省略輸出）。
接下來看一下其他種類的金融資料與其他功能。研究並比較不同產業間的表現時，產業
類別也是十分有用的資訊。
ch14.indd 552 2014/4/2 下午 02:58:46
14.1 使用 Mathematica 線上金融資料
|
553
共有 169 個產業類別，以下使用字串模式匹配取出名稱內含
"Service"
的產業【譯註：
目前類別數已增加至 215，產業類別內容也有所變動】。
你 可 以 查 詢 指 定 產 業 的 成 員。 也 可 以 查 詢 指 定 指 數 的 成 員， 例 如 標 準 普 爾
500 或 紐 約 證 券 交 易 所（New York Stock Exchange，NYSE）。 以 下 隨 機 挑 選
OilNaturalGasFieldServices ...
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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.