1. Reduced System Structure and Get a quick grasp of basic knowledge (larger domain and orangic)
2. Adjustable Knowledge Details(FAQs, Common Brilliant Features)
3. Practice Make Perfect and modify the knowledge Structure
4. Refine your ideas in your mind and produce excellent post in the website
Information Source
A: CHEAT SHEET
Stage 1 — Quick Introduction
1.1 Highlighted Introduction
In Contrast with
with Other Modules or Progamming Language
Application
1.2 Data Structure
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1.3. Data Acquisition and Cleaning
I/O
Create
Inspect
1.4. Data Manipulation
Selction - SubSetting , Slicing , Indexing (索引而并非本体操作，一种次序属性)
Reaction - Array Mathematics (Arithmetic Operations, Aggregate Functions)
Search and Prospect - Searching , Comparison，Sorting, Filtering
Manipulation- Combine, Reshape, Splitting（本体操作）
