September 2013
Intermediate to advanced
264 pages
5h
Chinese
Content preview from Bad Data 技術手冊
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回應問題
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201
描述問題
除了單純提供檔案，我需要解釋這個競賽的目的，以及為什麼它值得參加。身為一個拮
据的新創公司，我們只能夠負擔五千美金的獎金，而我們需要在三週內就有結果，所以
我需要盡可能的使用敘述文字來給予參賽者動機參加！就目前看來，人們似乎很樂於參
加不尋常短長度的比賽。敘述文字在解釋資料代表什麼時也很有用。理論上來說，機器
學習不需要知道任何在表中的數字代表什麼，但實際上，選擇要套用什麼技術以及要專
注於什麼模式都是門藝術，而知道資料是關於什麼則有助於選擇。最終，我撰寫了一篇
文章討論我們所遇到的問題，而這似乎是非常有效的。在文章裡面包含一張小的熱帶海
灘照片也似乎頗有用！
理論上來說，一個機器學習專家能夠將你的問題視為純數字的問題來處理。實際上，建
立好的演算法需要許多的判斷以及直覺，所以給他們一些關於你的領域的教育是很值得
的。多數的資料集合擁有許多不同的特徵值，而它幫助我們知道在真實世界中是用來代
表哪些性質，所以你能夠調整你的演算法，讓其專注於擁有較好預測能力的特徵值上。
回應問題
當我們上線時，我持續關注 Kaggle 討論區，並且嘗試回答他們詢問的問題。這實在是
有些困難，因為其他社群成員或是 Kaggle 員工通常都會在我之前就回答了！看到每個
人對於問題有多熱心就讓人非常興奮。最終，這個三週的比賽帶給我不多的工作量，儘
管我知道這是因為參賽者是非常忙碌的。
這個資料競賽的方式，跟傳統的外包專案相比，讓我們學習到了不同的經驗。所有事前
的準備步驟都是在為參賽者建立一個極度良好定義的問題，而在我們這邊，不能中途更 ...
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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.